ES2800438T3 - Method and apparatus for monitoring a transmission interrupted indication in a wireless communication system - Google Patents

Abstract

A method performed by a user equipment, hereinafter also referred to as UE, comprising: the UE receives a configuration that the UE communicates with a first serving cell and a second serving cell (1505); and the UE receives a configuration of a periodicity to monitor a downlink control signal in the first serving cell (1510), wherein the downlink control signal includes a preference indication, hereinafter also referred to as PI , for the second serving cell, characterized in that the periodicity for monitoring the downlink control signal in the first serving cell includes an integer of symbol or symbols of the second serving cell, wherein a subcarrier space , hereinafter also referred to as SCS, of an activated bandwidth part, below also referred to as BWP, of the first serving cell is different from an SCS of an activated BWP of the second serving cell, in which the UE does not expect to receive a configuration such that the periodicity includes a non-integer symbol or symbols from the second serving cell.

Description

DESCRIPTION

Method and apparatus for monitoring a transmission interrupted indication in a wireless communication system

This disclosure relates generally to wireless communication networks and, more particularly, to a method and apparatus for improving planning in a wireless communication system.

With the rapidly growing demand for communication of large amounts of data to and from mobile communication devices, traditional mobile voice communication networks are evolving into networks that communicate with Internet Protocol (IP) packets of data. Such IP packet data communication can provide users of mobile communication devices with voice over IP, multimedia, multicast and on-demand communication services.

An illustrative network structure is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN). The E-UTRAN system can provide high data throughput to perform the above-mentioned voice over IP and multimedia services. A new radio technology for the new generation (eg 5G) is currently being discussed by the organization of the 3GPP standard. Accordingly, changes are currently being submitted to the current core part of the 3GPP standard and considering evolving and finalizing the 3GPP standard.

LIVE on "Multiplexing data with different transmission durations", Draft 3GPP, R1-1800205, discusses DL preference indication issues and mentions that within a PUCCH group, a UE can be configured to monitor common group PDCCH for indication of preference (ie PI) for a SCell in a different serving cell.

INTEL CORPORATION in "Remaining details in multiplexing data with different durations", Draft 3GPP, R1-1800336, mentions some agreements that include agreements for SFI and agreements for PI.

Summary

A method and apparatus are disclosed from the perspective of a UE (user equipment) and a base station and defined in the independent claims. The dependent claims define preferred embodiments thereof. In one embodiment, the method includes the base station that configures the UE with a first serving cell and a second serving cell. The method also includes the base station configuring the UE with a periodicity to monitor a downlink control signal in the first serving cell, wherein the base station is not allowed to configure the UE such that the periodicity to monitor the downlink control signal in the first serving cell includes a non-integer number of symbol or symbols from the second serving cell, wherein a subcarrier space of an activated bandwidth portion of the first serving cell it is different from an SCS of an activated BWP of the second serving cell, and in that the downlink control signal includes a Preference Indication (PI) for the second serving cell.

Brief description of the drawings

Figure 1 shows a diagram of a wireless communication system according to an illustrative embodiment.

Figure 2 is a block diagram of a transmitter system (also known as an access network) and a receiver system (also known as user equipment or UE) in accordance with an illustrative embodiment. Figure 3 is a functional block diagram of a communication system in accordance with an illustrative embodiment.

Figure 4 is a functional block diagram of the program code of Figure 3 in accordance with an illustrative embodiment.

Figure 5 is a reproduction of Table 4.2-1 of 3GPP R1-1721341.

Figure 6 is a reproduction of Figure 4.3.1-1 of 3GPP R1-1721341.

Figure 7 is a reproduction of Table 4.3.2-1 of 3GPP R1-1721341.

Figure 8 is a reproduction of Table 4.3.2-2 of 3GPP R1-1721341.

Figure 9 is a reproduction of Table 7.3.2.1-1 of 3GPP R1-1721341.

Figure 10 is a reproduction of Table 10.1-1 of 3GPP R1-1721343.

Figure 11 is a diagram in accordance with an illustrative embodiment.

Figure 12 is a diagram in accordance with an illustrative embodiment.

Figure 13 is a diagram in accordance with an illustrative embodiment.

Figure 14 is a diagram in accordance with an illustrative embodiment.

Figure 15 is a flow chart in accordance with an illustrative embodiment

Figure 16 is a flow chart in accordance with an illustrative embodiment

Figure 17 is a flow chart in accordance with an illustrative embodiment

Figure 18 is a flow chart in accordance with an illustrative embodiment

Figure 19 is a flow chart in accordance with an illustrative embodiment

Figure 20 is a flow chart in accordance with an illustrative embodiment

Detailed description

The illustrative wireless communication systems and devices described below employ a wireless communication system, which supports a broadcast service. Wireless communication systems are widely deployed to provide various types of communication such as voice, data, and so on. These systems can be based on code division multiple access (CDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), 3GPP LTE (Long Term Evolution) wireless access, 3GPP lTE-A or Advanced LTE (Advanced Long Term Evolution), 3GPP2 UMB (Ultra Mobile Broadband), WiMax, 3GPP NR (New Radio) or some other modulation techniques.

In particular, the illustrative wireless communication system devices described below may be designed to support one or more standards such as the standard offered by a consortium called the "3rd Generation Wireless Technologies Common Project" referred to herein as 3GPP, which include: 3GPP TSG RAN WG1 Final Report # AH_NR2 v1.0.0 (Qingdao, China, June 27 - 30, 2017); Final Note from the President of 3GPP TSG RAN WG1 Meeting # 90 (Prague, Czech Republic, August 21 - 25, 2017); Final Note from the President of 3GPP TSG RAN WG1 Meeting # AH_NR3 (Nagoya, Japan, September 18 - 21, 2017); 3GPP TSG RAN WG1 Chairman's Final Note Meeting # 90 bis (Prague, CZ, Oct 9 - 13, 2017) (updated with email approvals); Final Note from the President of 3GPP TSG RAN WG1 Meeting # 91 (Reno, United States, November 27 - December 1, 2017); R1-1721341, "NR; Physical channels and modulation (Release 15)"; R1-1721342, "NR; Multiplexing and channel coding (Release 15)"; R1-1721343, "NR; Physical layer procedures for control (Release 15)"; R1-1721344, "Summary of 7.3.3.6 multiplexing data with different transmission durations".

Figure 1 shows a multi-access wireless communication system according to one embodiment of the invention. An access network 100 (AN) includes groups of multiple antennas, one including 104 and 106, another including 108 and 110, and an additional one including 112 and 114. In Figure 1, only two antennas are shown for each group of antennas, however, more or fewer antennas can be used for each group of antennas. Access terminal 116 (AT) is in communication with antennas 112 and 114, wherein antennas 112 and 114 transmit information to access terminal 116 via forward link 120 and receive information from access terminal 116 over the reverse link 118. Access terminal (AT) 122 is in communication with antennas 106 and 108, wherein antennas 106 and 108 transmit information to access terminal (AT) 122 through forward link 126 and receive information from access terminal (AT) 122 over reverse link 124. In an FDD system, communication links 118, 120, 124 and 126 may use a different frequency for communication. For example, forward link 120 may use a different frequency than that used through reverse link 118.

Each group of antennas and / or the area in which they are designed to communicate is often referred to as a sector of the access network. In the embodiment, each group of antennas is designed to communicate to access terminals in a sector of the areas covered by the access network 100.

In communication over the forward links 120 and 126, the transmitting antennas of the access network 100 may use beamforming to improve the signal-to-noise ratio of forward links for the different access terminals 116 and 122. Also, an access network that uses beamforming to transmit to access terminals randomly dispersed throughout its coverage causes less interference to access terminals in neighboring cells than an access network that transmits through from a single antenna to all its access terminals.

An access network (AN) can be a fixed station or base station used to communicate with terminals and can also be referred to as an Access Point, Node B, Base Station, Enhanced Base Station, Evolved Node B (eNB ), or some other terminology. An access terminal (AT) may also be called user equipment (UE), a wireless communication device, terminal, access terminal, or some other terminology.

Figure 2 is a simplified block diagram of one embodiment of a transmitter system 210 (also known as the access network) and a receiver system 250 (also known as an access terminal (AT) or user equipment (UE)) in a MIMO system 200. In transmitter system 210, traffic data is provided for a number of data streams from a data source 212 to a transmission data processor (TX) 214.

Preferably, each data stream is transmitted through a respective transmitting antenna. The TX data processor 214 formats, encodes, and interleaves the traffic data for each data stream based on a particular code scheme selected for that data stream to provide encoded data.

The encoded data for each data stream can be multiplexed with pilot data using OFDM techniques. Pilot data is usually known data patterns that are processed in a known way and can be used in the receiving system to estimate the channel response. The multiplexed encoded and pilot data for each data stream is then modulated (i.e., symbol-matched) based on a particular modulation scheme (e.g., BPSK, QPSK, M-PSK, or M-QAM) selected to that data stream provides modulation symbols. The data rate, encoding, and modulation for each data stream can be determined by instructions performed by processor 230.

The modulation symbols for all the data streams are then provided to a TX MIMO processor 220, which can further process the modulation symbols (eg, for OFDM). The TX MIMO processor 220 then provides N ^t modulation symbol streams to N ^t transmitters (TMTR) 222a to 222t. In certain embodiments, the TX MIMO processor 220 applies beamforming weights to the symbols in the data streams and to the antenna from which the symbol is being transmitted.

Each transmitter 222 receives and processes a respective symbol stream to provide one or more analog signals, and further conditions (e.g., amplifies, filters, and upconverts) the analog signals to provide a modulated signal suitable for transmission over the signal channel. MIME. Next, N ^t modulated signals are transmitted from transmitters 222a to 222t from N ^t antennas 224a to 224t, respectively.

In receiver system 250, the transmitted modulated signals are received by N ^r antennas 252a to 252r and the received signal from each antenna 252 is provided to a respective receiver (RCVR) 254a to 254r. Each receiver 254 conditions (eg, filters, amplifies, and downconverts) a respective received signal, digitizes the conditioned signal to provide samples, and additionally processes the samples to provide a corresponding "received" symbol stream.

An RX data processor 260 then receives and processes the N ^R received symbol streams from N ^R receivers 254 based on a processing technique to provide N particular receptor streams ^r "detected" symbol. The RX data processor 260 then demodulates, de-interleaves, and decodes each detected symbol stream to recover the traffic data for the data stream. Processing by the RX 260 data processor is complementary to that performed by the TX 220 MIMO processor and the TX 214 data processor in the transmitter system 210.

A processor 270 periodically determines which precoding matrix to use (discussed below). Processor 270 formulates a reverse link message that comprises an array index portion and a rank value portion.

The reverse link message may comprise various types of information regarding the communication link and / or the received data stream. The reverse link message is then processed by a TX data processor 238, which also receives traffic data for a number of data streams from a data source 236, is modulated by a modulator 280, conditioned by transmitters 254a to 254r and transmits back to transmitter system 210.

In transmitter system 210, modulated signals from receiver system 250 are received by antennas 224, conditioned by receivers 222, demodulated by a demodulator 240, and processed by a data processor of RX 242 to extract the reverse link message transmitted by receiver system 250. Processor 230 then determines which coding matrix to use to determine the beamforming weights, then processes the extracted message.

Turning to Figure 3, this figure shows an alternative simplified functional block diagram of a communication device according to an embodiment of the invention. As shown in Figure 3, the communication device 300 in a wireless communication system can be used to realize the UE (or AT) 116 and 122 in Figure 1 or the base station (or AN) 100 in Figure 1, and the wireless communication system is preferably the NR system. Communication device 300 may include an input device 302, an output device 304, a control circuit 306, a central processing unit (CPU) 308, a memory 310, a program code 312, and a transceiver 314. The Control circuit 306 executes program code 312 in memory 310 through CPU 308, thereby controlling an operation of communications device 300. Communications device 300 can receive signals input by a user through the device. input 302, such as a keyboard or keypad, and can output images and sounds through output device 304, such as a monitor or speakers. Transceiver 314 is used to receive and transmit wireless signals, distribute received signals to control circuit 306, and output signals generated by control circuit 306 wirelessly. Communication device 300 in a wireless communication system can also be used to realize AN 100 in Figure 1.

Figure 4 is a simplified block diagram of program code 312 shown in Figure 3 in accordance with one embodiment of the invention. In this embodiment, program code 312 includes an application layer 400, a layer portion 3402, and a layer portion 2404, and is coupled to a layer portion 1406. The layer portion 3402 generally performs resource control of radio. Layer 2404 portion generally performs link control. The Layer 1406 portion generally makes physical connections.

In general, group common DCI (Downlink Control Information) is used to convey Preference Indication (PI). The 3GPP TSG RAN WG1 Final Report # AH_NR2 captures the following agreement:

Agreements:

• For downlink preference indication.

• It is transmitted using a common group DCI on PDCCH.

• For further study: this common group DCI is transmitted separately from SFI.

• If a UE needs to monitor preference indication it is configured by RRC signaling.

• The time domain preference indication granularity can be configured.

• Details of granularity are for further study.

In the Final Note from the Chairman of 3GPP TSG RAN WG1 Meeting # 90, the concept of reference downlink resource for preferred resource or resources has been agreed as follows: Agreements:

• Preference resource or resources within a certain time / frequency region (ie reference downlink resource) within the periodicity to monitor group common DCI for preference indication, it is indicated by the group common DCI that carries the preference indication.

• The frequency region of the reference downlink resource is configured semi-statically. • For further study: signaling explicitly or implicitly derived by other RRC signaling.

• The time region of the reference downlink resource is configured semi statically.

• For further study: signaling explicitly or implicitly derived by other RRC signaling.

• The preference indication frequency granularity is set to be and RB within the reference downlink resource for the given numerology.

• For further study: signaling explicitly or implicitly derived by other RRC signaling.

• Note: the and RBs may correspond to the entire frequency region of the downlink reference resource.

• The preference indication time granularity is configured to be x symbols within the reference downlink for given numerology.

• For further study: signaling explicitly or implicitly derived by other RRC signaling.

• Note: Preference indication time / frequency granularities should take into account the payload size of the group common DCI carrying preemption indication.

The Final Note from the 3GPP TSG RAN WG1 Chairman Meeting # AH_NR3 captures some agreements related to group common DCI carrying PI as described below, including an agreement that introduces a TCI (Transmission Configuration Indication) into a DCI for indication of QCL (Quasi Co-location) of data transmission:

R1-1716842 WF on QCL indication for Physical Channels from DL, Ericsson, CATT, NTT Docomo, Samsung, Qualcomm.

Agreement:

A UE is configured per RRC with a list of up to M Transmission Configuration Indication (TCI) candidate states at least for QCL indication purposes.

• If M is equal to or greater than 2N it is for further studies, where N is the size of the DCI field for PDSCH.

• For further study: correlation between the candidate states with the states described by the N-bit DCI field for PDSCH.

• Each TCI state can be configured with a set of RSs.

• Each DL RS ID (for further study: ID details) at least for the purpose of spatial QCL in a set of RS can refer to one of the following types of DL RS:

• SSB.

• Periodic CSI-RS.

• Aperiodic CSI-RS.

• CSI-RS semi persistent.

• For further studies: another SR (for example, TRS, PTRS) in a set of SRs depending on the analysis result in the QCL agenda item.

• For further study: mechanisms to initialize / update the ID of one or more DL RSs in the RS set used at least for spatial QCL purposes.

• At least the following two mechanisms are for further study: (1) explicit signaling to the UE of DL RS IDs and corresponding implicit association of TCI state (2) of the DL RS ID (s) to a TCI state based on measurements by the UE.

• The mechanisms used for different types of SR are for further study.

• For further study: whether or not a TCI status includes one or more other parameters, for example, for PDSCH rate matching purposes.

• For further study: value of N, where N is at most [3] bits.

Note: more details on specifying more than one DMRS port group and more than one set of RSs per TCI state will be completed after the December release.

Agreement:

The QCL configuration for PDCCH contains the information that provides a reference to a TCI state.

• Alt 1: QCL setting / indication is on a per CORESET basis.

• The UE applies the QCL assumption on associated CORESET supervisory occasions. All the search space (s) within CORESET use the same QCL.

• Alt 2: QCL setting / indication is on a per search space basis.

• The UE applies the QCL assumption on an associated search space. This could mean that in the case where there are multiple search spaces within a CORESET, the UE can be configured with different QCL assumptions for different search spaces.

• Note: QCL configuration indication is done by MAC RRC or RRC CE (for further studies: by DCI) Note: The above options are provided as input to the control channel agenda item analysis.

R1-1716890 Summary on Offline Beam Management, Qualcomm

Agreement:

• For QCL indication for PDSCH:

◦ When TCI states are used for QCL indication, the UE receives an N-bit TCI field in DCI. ■ The UE assumes that the PDSCH DMRS is QCL with the DL RS (s) in the RS set corresponding to the signaled TCI state.

• For further study: whether or not a QCL type is configured, configuration details are for further study.

◦ Whether or not the TCI field is always present in a given DL-related DCI is for further study.

◦ For further study: whether or not the TCI field is in the same DCI as the one containing the PDSCH planning map.

For further study: timing between when the UE receives a QCL configuration / indication and the first time that the QCL assumption can be applied for PDSCH or PDCCH demodulation.

Agreements:

UE can be configured to monitor group common PDCCH for SFI and group common DCI for DL preference indication within the same or different CORESETs.

Agreements:

• As a job assumption.

• The time duration of the reference downlink resource for preference indication is equal to the monitoring periodicity of the group common DCI carrying the preference indication.

• For the determination of the frequency region of the reference downlink resource for preference indication, select downwardly from the following options in RAN1 # 90 bis.

• Option 1: The reference downlink resource frequency region is explicitly configured by RRC.

• Option 2: The frequency region of the reference downlink resource is implicitly derived by the active DL BWP.

• NOTE: Companies are encouraged to address the issues highlighted in the offline summary of technical document R1-1716911.

Agreements:

• The minimum periodicity for UE to monitor group common DCI for DL preference indication is selected from among.

• Option 1: an interval.

• Option 2: less than one interval.

The Final Note from the 3GPP TSG RAN WG1 Chairman Meeting # 90 bis captures some agreements as described below. An agreement describes reference downlink resource for preference indication is equal to monitoring periodicity of the group common DCI carrying PI. Additionally, PI interval level monitoring periodicity is supported.

Agreements:

• The time duration of the reference downlink resource for preference indication is equal to the monitoring periodicity of the group common DCI carrying the preference indication.

• In TDD, at least semi statically configured UL symbols are excluded from the reference downlink resource.

• Note: This means that the reference downlink resource only includes the DL or unknown symbols given by semi-static configuration within the semi-statically configured time duration of the reference downlink resource.

• For subsequent studies: for the treatment of a reserved resource, especially at the ER level.

Agreements:

• For minimum supervision periodicity of preference indication:

• At least monitoring periodicity is supported at the preference indication interval level.

• For further studies: to additionally support other cases (for example, supervision at the non-interval level).

Agreements:

• For interval level monitoring periodicity, the UE is not required to monitor the preference indication for an interval in which PDSCH is not scheduled.

• UE is not required to monitor preference indication in DRX intervals.

• UE is not required to monitor preemption indication for DL BWP off.

• Note: not necessarily all of the above points will have an impact on specifications.

Agreements:

• The HARQ timeline for a PDSCH transmission is not affected by the preference indication. Agreements:

• No consensus to introduce explicit RRC setting for reference downlink resource frequency region for preference indication in Ver. 15.

• (working assumption) The frequency region of the reference downlink resource for preference indication is the active DL BWP.

Agreements:

• A fixed payload size (excluding CRC and potential reserved bits) of the group common DCI carrying the downlink preference indication (PI), in the format of a bitmap, is used to indicate preference resources. within the semi statically configured DL reference resource.

- The bitmap indicates for one or more frequency domain parts (N> = 1) and / or one or more time domain parts (M> = 1).

• There is no RRC configuration involved in determining the frequency or time domain parts.

- The following combinations are supported and predefined {M, N} = {14, 1}, {7, 2} A combination of {M, N} from this set of possible {M, N} is indicated 1 bit by configuration of RRC for a UE.

As discussed in the Final Note from the 3GPP TST RAN WG1 Chairman Meeting # 91, based on the cited working assumption (discussed below), the UE may receive a DCI carrying multiple PIs that correspond to configured correlation between each PI and a service cell.

Working assumption:

• DCI payload size for preference indication is configurable via RRC.

- For further study the interaction with DCI payload size for SFI especially in terms of RRC configuration, and potentially other DCI formats.

Agreements:

• Within a group of PUCCHs, UE can be configured to monitor common group PDCCHs for indication of preference for a SCell in a different serving cell.

• A DCI may contain one or more preference indication field (s) corresponding to one or more serving cells.

• Each field (14-bit bitmap) for a serving cell.

• RRC configures the PI field location in the DCI format that applies to that cell.

Agreements:

• The supported periodicities for interval-level preference monitoring are - intervals 1, 2, TBD1, TBD2.

Agreements:

• No consensus to support monitoring periodicity at the mini-interval level of preference indication in RAN1 # 91.

Agreements:

• Confirm the following working assumption in RAN1 # 90 bis

- The frequency region of the reference downlink resource for preference indication is the active DL BWP.

Agreements:

• Preference indication UE monitoring setup is by DL BWP.

Agreements:

• For bitmap indication, the time-frequency blocks of the reference DL resource determined by {M, N} ({M, N} = {14, 1}, {7, 2}) are indexed from a way of first frequency.

◦ Note: The reference DL resource is divided with M time domain parts and N frequency domain parts.

◦ Note: the current TS38.213 needs to be updated according to the previous agreement.

Agreements:

• When a PI is detected, the time location of the corresponding Reference DL Resource (RDR) is determined by:

◦ The RDR starts at the ^1st symbol of the previous CORESET for PD monitoring and ends together before the current CORESET where the PI is detected.

Agreements:

The UE is not expected to consider a PI detected in one BWP for a PDSCH scheduled in a different BWP in the same serving cell.

3GPP R1-1721341 provides the following description of some PDCCH (Physical Downlink Control Channel) frame and structure configurations:

4 Frame structure and physical resources

4.1 General

Throughout this specification, unless otherwise indicated, the size of various fields in the time domain is expressed as a number of time units T ^c = 1 / (Af ^max N ^f ) where Af ^max = 480 10 ³ Hz and N ^f = 4096. The constant K = T ^s / T ^c = 64 where T ^s = 1 / (Af ^re rM, ^ref ), Af ^e = 1510 ³ Hz and ^fef = 2048.

4.2 Numerologies

Multiple OFDM numerologies are supported as provided by Table 4.2-1 where m and the cyclic prefix for a portion of carrier bandwidth are provided by the upper layer parameters DL-BWP-mu and DL-BWP- cp for the downlink and UL-BWP-mu and UL-BWP-cp for the uplink.

[Table 4.2-1 of 3GPP R1-1721341, titled "Supported transmission numerologies", is reproduced as Figure 5] 4.3 Frame structure

4.3.1 Frames and subframes

The downlink and uplink transmissions are organized into frames with Tf = (AfmaxM / 100) Tc = 10 ms in duration, often consisting of subframes of TSf = (AfmaxM / 1000) Tc = 1 ms in duration each. The »rsubframe./y _» interval * ¡ subframe, //

number of consecutive OFDM symbols ■ Vs [mb - '' 'simb' 'interval • Each frame is divided into two frames of equal size of five subframes each with half frame 0 consisting of subframes 0 - 4 and half frame 1 consisting of subframes 5-9.

There is a set of frames on the uplink and a set of frames on the downlink on a carrier. Transmission of the uplink frame number i of the UE will start T ^ta = (NTA + NTA, offset) Tc before the start of the corresponding downlink frame in the UE in which NTA, offset depends on the band of frequency according to [38,133].

[Figure 4.3.1-1 of 3GPP R1-1721341, titled "Uplink-downlink timing relation", is reproduced as Figure 6] 4.3.2 Intervals

= -jn wsubframe, m _ i! ■ For m subcarrier space configuration , intervals are listed ^{"s = r> - •" irtetvab} in order „fi ^ J ^a .7 su titania, I,

ascending within a subframe and ^{"sl e" interval. (} in ascending order within a frame. There are yy interval i / interval

simt OFDM symbols in a range where vsimb depends on the cyclic prefix as provided by Tables 4.3.2-1 and 4.3.2-2. The i ^{nt *} ome interval> - in a sub - frame is aligned in time with the start of * 7 E i .intervalo

■ n OFDM symbol in the same subframe.

OFDM symbols in a slot can be classified as 'downlink' (indicated 'D' in Table 4.3.2-3), 'flexible' (indicated 'X'), or 'uplink' (indicated 'U') .

In a downlink slot, the UE will assume that downlink transmissions occur only on 'downlink' or 'flexible' symbols.

In an uplink slot, the UE will transmit only in 'uplink' or 'flexible' symbols.

[Table 4.3.2-1 of 3GPP R1-1721341, titled "Number of OFDM symbols per slot, slots per frame, and slots per subframe for normal cyclic prefix", is reproduced as Figure 7]

[Table 4.3.2-2 of 3GPP R1-1721341, titled "Number of OFDM symbols per slot, slots per frame, and slots per subframe for extended cyclic prefix", is reproduced as Figure 8]

7.3.2 Physical Downlink Control Channel (PDCCH)

7.3.2.1 Channel Control Element (CCE)

A Physical Downlink Control Channel consists of one or more channel control elements (CCE) as indicated in Table 7.3.2.1-1.

[Table 7.3.2.1-1 from 3GPP R1-1721341, titled "Supported PDCCH aggregation levels", is reproduced as Figure 9]

7.3.2.2 Control resource set (CORESET)

x, COR ESET

A set of control resources consists of "Kli resource blocks in the frequency domain,

CORESET

given by the upper layer parameter CORESET-freq-dom, and simb e {1,2,3} symbols in the ^ CORESET domain

time, given by the upper layer parameter CORESET-time-dur, where 's'mb = 3 is supported only if the upper layer parameter DL-DMRS-typeA-pos is equal to 3.

A control channel element consists of 6 resource element groups (REG) in which one resource element group equals one resource block during an OFDM symbol. Groups of resource items within a control resource set are listed in ascending order in a first-time fashion, starting with 0 for the first OFDM symbol and lowest numbered resource block in the control resource set.

A UE can be configured with multiple sets of control resources. Each set of control resources is associated with only one mapping from c Ce to REG.

The CCE to REG mapping for a set of control resources can be interleaved or not interleaved, configured by the upper layer parameter CORESET-CCE-REG-mapping-type, and is described by REG groupings:

- REG grouping / is defined as REG {iL, iL + / \, ..., iL L - 1} where L is the size of the REG grouping, i = 0.1 ..... , CORESET _ _

" 'and" SEG ~' ¥ RB '' symbol is the REG number in CORESET

■ CCE j consists of groupings of REG {f {6j / L), f {6j / L + 1), ..., f (6y / L 6 / L - 1)} where f () is an interleaver.

For correlation of CCE to REG not interleaved, L = 6 and fj) = j.

»R CORESET i r CORESET

For interleaved CCE to REG correlation, L e {2,6} for J s'mb = 1 and L e {'symb, 6} where L is set by the upper layer parameter CORESET-REG-bundle-size. The interleaver is defined by / (y) = ( rC + C »daíteii« íto) lllod (A, R |? (^ L ''> l 1 / l)

j = cR + r

r = 0,1, ..., R-1

c = 0, 1 ,. , C-1

c - t e KFT / («) l

where R e {2,3,6} is provided by the upper layer parameter CORESET-interleaver-size and where

»R cell

- offset is a function of; | n for a PDCCH transmitted on a CORESET over the PBCH or RMSI.

- n ^shift e {0,1, ..., 274} is a function of the upper layer parameter CORESET-shift-index.

The UE can assume

- the same frequency domain precoding that is used within a REG bundle if the upper layer parameter CORESET-precoder-granularity equals CORESET-REG-bundle-size.

- the same frequency-domain precoding that is used across all resource element groups within the set of contiguous resource blocks in CORESET if the upper layer parameter CORESET-precoder-granularity is equal to the size of the CORESET in the frequency domain

For a CORESET configured by PBCH, L = 6.

7.3.2.3 Randomization

The UE will assume that the block of bits d (0), ..., d (Mb¡t-1), where Mbit is the number of bits transmitted on the physical channel, will be scrambled before modulation, resulting in a block of randomized bits ¿(0), ..., ¿(A4, t-1) according to b ( i) = ( b ( i) c (;)) mod 2

where the randomization sequence c (i) is provided by clause 5.2.1.

7.3.2.4 PDCCH modulation

The UE will assume that the block of bits 6 (0), ..., /> (A4¡t-1) is modulated by QPSK as described in clause 5.1.3, resulting in a block of modulation symbols with complex evaluation d (0), ..., d (M ^symb -1).

7.3.2.5 Correlation with physical resources

The UE will assume that the complex valued symbol block d (0), ..., d (M ^symbol -1) is scaled by a factor jS ^pdcch and correlates with resource elements ( k, l) ^{p, m} in order Ascending of first k, then I, in the resource element groups used for the monitored PDCCHs.

7.4.1.3 Demodulation reference signals for PDCCH

7.4.1.3.1 Sequence generation

The UE will assume that the reference signal sequence r ( m) is defined by

where the pseudo-random sequence c (i) is defined in clause 5.2.1.

7.4.1.3.2 Correlation with physical resources

The UE will assume that the sequence r (m) maps to physical resource items according to

k = 0.1.2

^it CORESET

/ = n mod 'simk

n = 0, 1 ,.

where the following conditions are met

- are within the groups of resource elements that they constitute, the PDCCH the UE tries to decode if the upper layer parameter CORESET-precoder-granularity is equal to CORESET-REG-bundle-size,

- all groups of resource elements within the set of contiguous resource blocks in the CORESET in which the UE tries to decode the PDCCH if the upper layer parameter CORESET-precoder-granularity is equal to the size of the CORESET in the domain of the frequency.

The reference point for k is

- subcarrier 0 of the common resource block with the lowest number in CORESET if CORESET is configured by PBCH or RMSI,

- otherwise subcarrier 0 in common resource block 0.

The reference point for I is the first CORESET OFDM symbol.

A UE that does not attempt to detect a PDCCH in a CORESET will not make any assumption about the presence or absence of DM-RS in the CORESET.

In the absence of CSI-RS or TRS configuration, and unless configured otherwise, the UE may assume that PDCCH DM-RS and SS / PBCH block are quasi-co-located with respect to Doppler shift, Doppler spread , average delay, delay spread and spatial Rx.

As discussed in 3GPP R1-1721342 (as provided above), DCI formats for PDSCH scheduling may comprise a field designated as Transmission Configuration Indication (TCI). The field indicates an association between receiving PDSCH (Physical Downlink Shared Channel) DMRS (Demodulation Reference Signal) antenna ports and one or more of a reference signal or signals that is one of M TCI configured by RRC (Radio Resource Control) user-specific. A DCI format indicated as DCI format 2_1 is used to indicate preference indication.

7.3.1.2 DCI formats for PDSCH planning

7.3.1.2.1 Format 1_0

The DCI 1_0 format is used for PDSCH scheduling in a DL cell.

The following information is transmitted using the DCI 1_0 format:

Identifier for DCI formats - [1] bits.

-Frequency domain resource allocation

- Time domain resource allocation - X bits.

- Correlation VRB to PRB -1 bit.

- Coding and modulation scheme - [5] bits as defined in section x.x of [6, TS38.214].

- New data flag -1 bit.

- Redundancy version - [2] bits as defined in section x.x of [6, TS38.214].

- Process number of hAr Q - [4] bits.

- Downlink assignment index - 2 bits as defined in section 9.1.3 of [5, TS38.213].

- TPC command for scheduled PUCCH - [2] bits as defined in section x.x of [5, TS38.213].

- PUCCH resource flag - [2] bits as defined in section x.x of [5, TS38.213].

- PDSCH-to-HARQ_feedback timer flag - [3] bits as defined in section x.x of [5, TS38.213].

7.3.1.2.2 Format 1 1

The DCI 1_1 format is used for PDSCH scheduling in a cell.

The following information is transmitted using the DCI 1_1 format:

- Carrier flag - 0 or 3 bits as defined in section x.x of [5, TS38.213].

- Identifier for DCI formats - [1] bits.

- Bandwidth part indicator - 0, 1 or 2 bits as defined in Table 7.3.1.1.2-1. The bit width for this field is determined according to the BandwidthPart-Config upper layer parameter for the PDSCH.

Frequency domain resource allocation b¡ts if only UL type, BWP is configured

/ ^ U l bits si se configuran ambos tipos de asignación de recursos 1 y 0resource allocation 0, flogjíAf ^RB -1) -) if only the type of _resource allocation is configured 1 max (riog2 (<r - (/ C B- 0/2) 1

/ ^ U l bits if both resource allocation types 1 and 0 are configured

- If both resource allocation types 0 and 1 are configured, the MSB bit is used to indicate resource allocation type 0 or resource allocation type 1, where the bit value of 0 indicates resource allocation type. resources 0 and the bit value of 1 indicates resource allocation type 1.

- For resource allocation type 0, the LBS provides the resource allocation as defined in section 6.1.2.2.1 of [6, TS38.214]

For resource allocation type 0, the riog; (AC '“" ’<j e *" l> / 2) The LBS provide resource allocation as defined in section 6.1.2.2.2 of [6, TS38.214].

- Time domain resource allocation -1, 2, 3, or 4 bits as defined in section X.X of [6, TS38.214]. The bit width for this field is determined according to the upper layer parameter XXX.

- Correlation of VRB to PRB - 0 or 1 bit, only applicable to resource allocation type 1, as defined in section xxx of [4, TS38.211].

- 0 bit if only resource allocation type 0 is configured;

- otherwise 1 bit.

- PRB pool size indicator - 0 bit if upper layer parameter PRB_bundling = OFF or 1 bit if upper layer parameter PRB_bundling = ON, as defined in section xx of [6, TS38.214].

- Rate matching indicator - 0, 1, or 2 bits according to the upper layer parameter rate-match-PDSCH-resource-set.

- ZP CSI-RS trigger - X bits

For transport block 1:

- Coding and modulation scheme - 5 bits as defined in section x.x of [6, TS38.214].

- New data flag -1 bit.

- Redundancy version - 2 bits as defined in section x.x of [6, TS38.214].

For transport block 2:

- Coding and modulation scheme - 5 bits as defined in section x.x of [6, TS38.214].

- New data flag -1 bit.

- Redundancy version - 2 bits as defined in section x.x of [6, TS38.214].

- HARQ process number - 4 bits.

- Downlink allocation index - number of bits as defined below.

- 4 bits if HARQ-ACK-codebook = dynamic upper layer parameter , where the 2 bits of MSB are the counter DAI and the two bits of LSB are the total DAIs;

- otherwise 0 bits.

- TPC command for scheduled PUCCH - 2 bits as defined in section x.x of [5, TS38.213]

- PUCCH resource indicator - 2 bits as defined in section x.x of [5, TS38.213]

- PDSCH-to-HARQ_feedback timing flag - 3 bits as defined in section x.x of [5, TS38.213].

- Antenna port or ports - 4, 5, or 6 bits as defined by Tables 7.3.1.2.2-1 / 2/3/4, in which the number of CDM groups without data values 1, 2 and 3 refers to CDM groups {0}, {0,1} and {0, 1,2} respectively.

- Transmission configuration indication - 0 bits if tci-PresentlnDCI upper layer parameter is not enabled; otherwise 3 bits as defined in section xx of [6, TS38.214].

- SRS Request - 2 bits as defined by Table 7.3.1.1.2-5.

- CBG Transmission Information - 0, 2, 4, 6, or 8 bits as defined in section xx of [6, TS38.214], determined by maxCodeBlockGroupsPerTransportBlock upper layer parameter for the PDSCH.

- Evacuation information of ^c B ^g - 0 or 1 bit as defined in section xx of [6, TS38.214], determined by upper layer parameter codeBlockGroupFlushlndicator.

- DMRS Sequence Initialization - 1 bit if transform precoding is enabled.

7.3.1.3 DCI formats for other purposes

7.3.1.3.1 Format 2_0

The DCI 2_0 format is used to report the interval format.

The following information is transmitted using the DCI 2_0 format:

- Identifier for DCI formats - [1] bits.

- Interval format indicator 1, Interval format indicator 2, .... Interval format indicator N. The format size of DCI 2_0 is configurable through upper layers, according to section 11.1.1 of [5 , TS38,213].

7.3.1.3.2 Format 2_1

The DCI format 2_1 is used to report the PRB (s) and OFDM symbol (s) in which the UE may assume that no transmission is anticipated for the UE.

The following information is transmitted using the DCI 2_1 format:

- Identifier for DCI formats - [1] bits.

- Preference indication 1, Preference indication 2, ..., Preference indication No.

The format size of DCI 2_1 is configurable by higher layers, according to section 11.2 of [5, TS38.213], each preference indication is 14 bits.

7.3.1.3.3 Format 2 2

The DCI 2_2 format is used for the transmission of TPC commands for PUCCH and PUSCH.

The following information is transmitted using the DCI 2_2 format:

- Identifier for DCI formats - [1] bits.

- TPC 1 command number, TPC 2 command number, ..., TPC N command number.

The xxx parameter provided by higher layers determines the index to the TPC command number for a cell. Each command number of t Pc is 2 bits.

7.3.1.3.3 Format 2_3

The DCI 2_3 format is used for the transmission of a group of TPC commands for SRS transmissions by one or more UEs. Along with a TPC command, an SRS request can also be transmitted.

The following information is transmitted using the DCI 2_3 format:

- Identifier for DCI formats - [1] bits

- block number 1, block number 2, ..., block number B

wherein the start position of a block is determined by the startingBitOfFormat2_3 parameter provided by higher layers for the UE configured with the block.

For a UL without PUCCH and PUSCH or a UL where SRS power control is not tied with PUSCH power control, a block is configured for the upper layer UE, with the following fields defined for the block:

- SRS request - 0 or 2 bits. The presence of this field is according to the definition in section x.x of [5, TS38.213], if present, this field is interpreted as defined by Table 7.3.1.1.2-5.

- TPC command number - 2 bits.

3GPP R1-1721343 provides the description below about the UE procedure for receiving control information. A CORESET can be configured with an association between the receiving DMRS (Demodulation Reference Signal) antenna port and one or more of one or more reference signals. The second quoted paragraph specifies the behavior of the UE related to a current discontinuous transmission indication. The NW (network) may configure a UE with one or more than one CORESET to monitor and receive a preference indication. A related description of BWP (Bandwidth Part) is also provided below.

10 UE procedure to receive control information

If the UE is configured with a SCG, the UE will apply the procedures described in this clause for both MCG and SCG.

- When the procedures are applied for CGM, the terms 'secondary cell', 'secondary cells', 'serving cell', 'serving cells' in this clause refer to secondary cell, secondary cells, serving cell, services that belong to the MCG respectively.

- When the procedures are applied for SCG, the terms 'secondary cell', 'secondary cells', 'serving cell', 'serving cells' in this clause refer to secondary cell, secondary cells (not including PSCell), cell service cells, service cells that belong to the SCG respectively. The term 'primary cell' in this clause refers to the PSCell of the SCG.

A UE will monitor a set of PDCCH candidates on one or more sets of control resources in the active DL BWP in each activated serving cell according to corresponding search spaces where monitoring involves decoding of each PDCCH candidate in accordance with supervised DCI formats.

A UE can be configured by SSB-periodicity-serving-cell upper layer parameter a half frame periodicity for SS / PBCH block transmission in a serving cell. If the UE has received SSB-transmitted-SIB1 and has not received SSB-transmitted and if REs for a PDCCH receive overlap with REs that correspond to SS / PBCH block indices indicated by SSB-transmitted-SIB1 , the UE receives the PDCCH excluding RE that correspond to SS / PBCH block indices indicated by SSB-transmitted-SIB1 . If a UE has received SSB-transmitted and if REs for a PDCCH reception overlap with REs that correspond to SS / PBCH block indices indicated by SSB-transmitted, the UE receives the PDCCH excluding REs that correspond to block indices of SS / PBCH indicated by SSB-transmitted.

If a bearer aggregation capacity for a UE, as included in UE-NR-Capability, is greater than X, the UE includes in UE-NR-Capability an indication for a maximum number of PDCCH candidates that the UE can monitor per interval when the UE is configured for carrier aggregation operation in more than X cells. When the UE is configured for carrier aggregation operation on X cells, the UE is not expected to be configured with a number of PDCCH candidates to monitor per interval that is greater than the maximum number.

10.1 UE procedure to determine physical downlink control channel assignment

A set of PDCCH candidates to monitor that a UE is defined in terms of PDCCH search spaces. A search space can be a common search space or a UE specific search space. A UE will monitor PDCCH candidates at non-DRX slots in one or more of the following search spaces

- a PDCCH type 0 common search space for a DCI format with the SI-RNTI in a primary cell; - an OA-type PDCCH common search space for a DCI format with scrambled CRC by an SI-RNTI in a primary cell;

- a PDCCH type 1 common search space for a DCI format with CRC scrambled by an RA-RNTI, or a TC-RnTI, or a C-RNTI in a primary cell;

- a PDCCH type 2 common search space for a DCI format with CRC scrambled by a P-RNTI in a primary cell;

- a PDCCH type 3 common search space for a DCI format with CRC randomized by INT-RNTI, or SFI-RNTI, or TPC-PUSCH-RNTI, or TPC-PUCCH-RNTI, or TPC-SRS-RNTI, or C-RNTI, or CS-RNTI; and - a UE specific search space for a DCI format with CRC scrambled by C-RNTI or CS-RNTI.

A UE is provided with a configuration for a set of control resources for the PDCCH type 0 common search space by the upper layer parameter RMSI-PDCCH-Config and a subcarrier space by the upper layer parameter RMSI-scs for PDCCH reception. The UE determines the control resource set and monitoring occasions for the PDCCH type 0 common search space as described in subclause 14. The PDCCH type 0 common search space is defined by the aggregation levels CCE and the number of candidates per CCE aggregation level given in Table 10.1-1.

The UE may assume that the DM-RS antenna port associated with PDCCH reception in the PDCCH type 0 common search space and the PDCCH type 2 common search space, and for corresponding PDSCH receptions, and the DM-RS antenna ports associated with SS / PBCH reception are quasi-collocated with respect to delay spread, Doppler spread, Doppler shift, average delay, and spatial Rx parameters. The value for the DM-RS scrambling sequence initialization is the cell ID.

For PDCCH type OA common search space or PDCCH type 2 common search space, the control resource set is the same as the control resource set for PDCCH type 0 common search space. A UE provides a configuration for the OA-type PDCCH common search space by the upper layer parameter osi-SearchSpace. A UE provides a configuration for the PDCCH type 2 common search space by the upper layer parameter paging-SearchSpace.

A subcarrier space and CP length for PDCCH reception with OA type PDCCH common search space, or type 1 PDCCH common search space, or type 2 PDCCH common search space are the same as for PDCCH reception with PDCCH type 0 common search space. A UE may assume that the DM-RS antenna port associated with PDCCH reception in the OA type PDCCH common search space and the DM antenna port -RS associated with SS / PBCH reception are quasi-located with respect to delay spread, Doppler spread, Doppler shift, mean delay, and spatial Rx parameters.

A UE may assume that the DM-RS antenna port associated with PDCCH reception and associated PDSCH reception in the PDCCH type 1 common search space are quasi-located with the DM-RS antenna port of the PDCCH reception. SS / PBCH associated with a corresponding PRACH transmission.

If a value for the DM-RS scrambling sequence initialization for PDCCH type OA common search space, or PDCCH type 1 common search space, or PDCCH type 2 common search space is not provided Using the PDCCH-DMRS-Scrambling-ID upper layer parameter in SystemlnformationBlockType1 , the value is the cell ID.

If a UE is configured for downlink bandwidth part (BWP) operation, as described in subclause 12, the above configurations for common search spaces apply for the Initial Active DL BWP. The UE can further configure a set of control resources for PDCCH type 0 common search space, OA type PDCCH common search space, type 1 PDCCH common search space or PDCCH type 1 common search space. Type 2 for each DL BWP configured in the primary cell, other than the initial active DL BWP, as described in subclause 12.

[Table 10.1-1 of 3GPP R1-1721343, titled "CCE aggregation levels and number of candidates per CCE aggregation level for PDCCH scheduling SystemlnformationBlockTypel in Type0-PDCCH common search space", reproduces as Figure 10]

For a serving cell, higher layer signaling provides a UE with P sets of control resources. For a set of control resources p, 0 <p <P in which a UE-specific search space, a PDCCH type 2 common search space, or a PDCCH type 3 common search space is mapped, the top layer signage provides:

- a control resource set index using the upper layer parameter CORESET-ID ;

- a DM-RS scrambling sequence initialization value using the upper layer parameter PDCCH-DMRS-Scrambling-ID;

- a number of consecutive symbols provided by the upper layer parameter CORESET-timeduration;

- a set of resource blocks provided by the upper layer parameter CORESET-freq-dom; - a CCE to REG mapping provided by the upper layer parameter CORESET-CCE-to-REG-mapping-type;

- a REG bundle size , in case of interleaved CCE to REG mapping, provided by the upper layer parameter CORESET-REG-bundle-size;

- a cyclic shift for the grouping interleaver of REG [4, 38.211] using the upper layer parameter CORESET-shift-index;

- an antenna port quasi colocation, from a set of antenna port quasi colocations provided by the upper layer parameter TCI-StatesPDCCH, indicating DM-RS antenna port quasi colocation information for PDCCH reception;

- an indication for a presence or absence of a transmission configuration indication field (TCI) for DCI format 1_0 or DCI format 1_1 transmitted by a PDCCH in control resource set p, by means of the upper layer parameter TCI- PresentlnDCI.

For each set of control resources in a DL BWP of a serving cell, a respective upper layer parameter CORESET-freq-dom provides a bitmap. Bitmap bits are one-to-one correlated with non-overlapping groups of 6 PRBs, in ascending order of PRB index in bandwidth of

J v! IW 6-I ^{n bwp} ! ( >].

^{vrb PRBs} in which the first PRB of the first group of 6 PRBs has index Rn ' If the UE has not received an indication for a quasi-antenna port colocation from the set of quasi-antenna port colocations provided by TCI-StatesPDCCH, the UE assumes that the DM-RS antenna port associated with PDCCH reception in the UE-specific search space is quasi-collocated with the DM-RS antenna port associated with PBCH reception with respect to delay spread, delay spread. Doppler, Doppler shift, average delay, and spatial Rx parameters.

For each serving cell that a UE is configured to monitor PDCCH in a different search space than PDCCH type 0 common search space, the UE is configured as follows:

- a number of search space sets using the search-space-config top layer parameter ; - for each set of search spaces in a set of control resources p

◦ an indication that the search space set is a common search space set or UE-specific set of search spaces by the Common-searchspace-flag top layer parameter;

° a number of PDCCH 1 ^{i /} p ⁽ⁱ⁾ candidates per CCE L aggregation level using the upper layer parameters Aggregation-level-1 , Aggregation-level-2, Aggregation-level-4, Aggregation-level-8, and Aggregation-level-16, for CCE 1 aggregation level, CCE 2 aggregation level, CCE 4 aggregation level, CCE 8 aggregation level and CCE 16 aggregation level, respectively;

◦ a PDCCH monitoring periodicity of kp slots using the Monitoringperiodicity-PDCCH-slot upper layer parameter ;

◦ a PDCCH monitoring offset of op intervals, where 0 < op < kp, by the upper layer parameter Monitoring-offset-PDCCH- interval;

◦ a PDCCH monitoring pattern within an interval, indicating the first symbol or symbols of the control resource set within an interval for PDCCH monitoring, using the upper layer parameter Monitoring-symbols-PDCCH-within-slot.

A UE determines a PDCCH monitoring occasion from the PDCCH monitoring periodicity, the PDCCH monitoring offset, and the PDCCH monitoring pattern within an interval.

S ( L,

A PDCCH UE-specific search space k> at the CCE L aggregation level e {1, 2, 4, 8, 16} is defined by a set of PDCCH candidates for the CCE L aggregation level.

If a UE is configured with the CrossCarrierSchedulingConfig upper layer parameter for a serving cell the bearer indicator field value corresponds to the value indicated by CrossCarrierSchedulingConfig.

For a serving cell in which a UE monitors PDCCH candidates in a UE specific search space, if the UE is not configured with a bearer indicator field, the UE will monitor PDCCH candidates without a bearer indicator field . For a serving cell in which a Ue monitors PDCCH candidates in a UE specific search space, if a UE is configured with a bearer indicator field, the UE will monitor PDCCH candidates with bearer indicator field.

A UE is not expected to monitor PDCCH candidates in a secondary cell if the UE is configured to monitor PDCCH candidates with bearer indicator field corresponding to that secondary cell in another serving cell. For the serving cell in which the UE monitors PDCCH candidates, the UE will monitor PDCCH candidates at least for the same serving cell.

For a set of control resources p, the CCEs that correspond to the PDCCH candidate mnci of the search space for a serving cell that corresponds to the na carrier indicator field value are provided by

where

for any common search space, P. «p = 0

for a specific search space of UE, ^Y P-kP = ( AP- ^• PK ^u P ~ ¹ ') modD, VP, -i = ^ornti * 0, Ao = 39827, Ai = 39829 and D = 65537;

i = 0, A, L-1;

na is the bearer indicator field value if the UE is configured with a bearer indicator field for the serving cell in which the PDCCH is monitored; otherwise, including for any common search space, nCi = 0;

A / cce, p is the number of CCEs, numbered from 0 to A / cce, pi, in set of control resources p; ... _ Q l / (¿) _ 1 \ { (

«A P,« a> where p '"a is the number of PDCCH candidates that the UE is configured to monitor for aggregation level L for a serving cell corresponding to nCi

for any common search space,

f a '. M {t)

for a UE specific search space, "is the maximum of p '" c, for all corresponding DCI formats in all values of nCi for a CCE L aggregation level in control resource set p;

the RNTI value used for for nRNTi is defined in [5, TS 38,212] and in [6, TS 38,214].

A UE configured to monitor PDCCH candidates in a serving cell with a DCI format size with carrier indicator field and CRC scrambled by C-RNTI, where the PDCCH candidates may have one or more possible field values of bearer indicator for DCI format size, it will assume that a PDCCH candidate with the DCI format size can be transmitted in the serving cell in any PDCCH UE specific search space corresponding to any of the possible values of carrier indicator field for DCI format size.

11.2 Discontinuous transmission indication

If an upper layer parameter Preemp-DL and Preemp-DL = ON is provided to a UE , the UE is configured with an INT-RNTI provided by the upper layer parameter INT-RNTI to monitor PDCCH carrying DCI format 2_1 [5 , TS 38,212]. The UE is additionally configured:

- set or sets of control resources and respective sets of search space to monitor PDCCH formatted from DCI 2_1 as described in subclause 10.1;

- a set of serving cells using the upper layer parameter INT-cell-to-INT;

- a mapping for each serving cell in the set of serving cells to a field in DCI 2_1 format by the upper layer parameter cell-to-INT;

- an information payload size for DCI 2_1 format using the upper layer parameter INT-DCI-payload-length;

- a monitoring periodicity for PDCCH in DCI 2_1 format using the upper layer parameter INT-monitoring-periodicity

- an indication granularity for time-frequency resources by means of the upper layer parameter INT-TF-unit.

If a UE detects a DCI 2_1 format for a serving cell from the configured set of serving cells, the UE may assume that no transmission to the UE is present in p Rb and in symbols, from a set of PRBs and a set of symbols of the last supervision period, which are indicated by the DCI format. The PRB set equals the active DL BWP as defined in subclause 12 and includes B ^int PRB. If a UE detects a DCI 2_1 format on a PDCCH transmitted in a set of control resources in the interval ⁱ t -T ^int , the set of symbols indicated by a field in DCI 2_1 format includes the last 14-T ^int symbols before the first symbol of the control resource set in the interval ^it -T ^int where T ^int is the value of the INT-monitoring-periodicity parameter and m is a natural number.

If the UE is configured with the upper layer parameter UL-DL-configuration-common, symbols indicated as uplink by UL-DL-configuration-common are excluded from the last ^{14 -T int} symbols before ^ CORESET

symbol in the interval ^{i t} -T ^int . The resulting set of symbols includes a number of symbols indicated as N ^int .

The UE configures the indication granularity for the PRB set and for the symbol set using the upper layer parameter INT-TF-unit.

If the value of INT-TF-unit is 0, 14 bits of a field in DCI 2_1 format have a one-to-one mapping with ^{14 consecutive symbol groups from the symbol set where each of the first Nint-} I ^{_Nint / 14_} | ^{-14 groups of symbols includes} T ^{Nint / 14} 1 ^{symbols, each of the last 14-Nint +} _ ^{Nint / 14} _ ^{-14 groups of symbols} includes _N ^int / 14_ symbols, a bit value of 0 indicates transmission to the UE in the corresponding symbol group and a bit value of 1 indicates no transmission to the UE in the corresponding symbol group.

If the value of INT-TF-granularity is 1, 7 bit pairs of a field in the DCI 2_1 format have a one-to-one correlation with 7 groups of consecutive symbols in which each of the first N ^int -_N ^int / 7_-7 ^symbol groups ^includes T ^{Nint / 7} 1 ^{symbols, each of the last 7 - Nint-} _ ^{Nint / 7} _ ^{-7 symbol groups includes} _ ^{Nint / 7} _ ^{symbols, a first bit in a pair of bits for a group of symbols is applicable to the subset of} T ^{Bint / 2} 1 ^first PRBs of the set of B ^int PRB, a second bit in the pair of bits for the group of symbols is applicable to the subset of the last _B ^int / 2_ PRB of the set of B ^int PRBs, a bit value of 0 indicates transmission to the UE in the corresponding symbol group and PRB subset, and a bit value of 1 indicates no transmission to the UE in the corresponding symbol group and PRB subset .

12 Bandwidth Part Operation

If the UE is configured with a SCG, the UE will apply the procedures described in this clause for both MCG and SCG.

- When the procedures are applied for CGM, the terms 'secondary cell', 'secondary cells', 'serving cell', 'serving cells' in this clause refer to secondary cell, secondary cells, serving cell, services that belong to the MCG respectively.

- When the procedures are applied for SCG, the terms 'secondary cell', 'secondary cells', 'serving cell', 'serving cells' in this clause refer to secondary cell, secondary cells (not including PSCell), cell service cells, service cells that belong to the SCG respectively. The term 'primary cell' in this clause refers to the PSCell of the SCG.

A UE configured for operation in parts of bandwidth (BWP) of a serving cell, a set of at most four parts of bandwidth (BWP) for receptions by the UE ( set of DL BWPs) in a DL bandwidth using the DL-BWP parameter and a set of at most four BWPs for transmissions for the UE (UL BWP set) in a UL bandwidth using the UL parameter -BWP for the service cell.

An initial active DL BWP is defined by a location and number of contiguous PRBs, a subcarrier space, and a cyclic prefix, for the set of control resources for the common search space of Type 0 PDCCH. For operation in the primary cell, a UE is provided by the initial-UL-BWP upper layer parameter an initial UL BWP for a random access procedure. If the UE is configured with a secondary carrier on the primary cell, the UE can be configured with an initial BWP for random access procedure on the secondary carrier.

For unpaired spectrum operation, a UE can expect that the center frequency for a DL BWP is the same as the center frequency for a UL BWP.

For each DL BWP or UL BWP in a set of DL BWP or UL BWP, respectively, the UE configures the following parameters for the serving cell as defined in [4, TS 38.211] or [6, TS 38.214]: - a subcarrier space provided by the DL-BWP-mu or UL-BWP-mu upper layer parameter ; - a cyclic prefix provided by the DL-BWP-CP or UL-BWP-CP upper layer parameter ;

- a number of contiguous PRBs provided by the DL-BWP-BW or UL-BWP-BW upper layer parameter ;

- an index in the set of DL BWPs or UL BWPs by respective upper layer parameters DL-BWP-index or UL-BWP-index for paired spectrum operation, or a link between a DL BWP and a UL BWP from the set of DL BWPs and UL BWPs configured using the upper layer parameter BWP-pair-index for a paired spectrum operation;

- a detection of DCI 1_0 or DCI 1_1 for a PDSCH receive timing by the DL-data-time-domain upper layer parameter , a PDSCH receive for a HARQ-ACK transmit timing value by the layer parameter upper DL-data-DL-acknowledgment, a DCI 0_0 or DCI 0_1 detection for a PUSCH transmit timing value using the upper layer parameter UL-datatime-domain;

- an offset of the first PRB of the DL bandwidth or the UL bandwidth, respectively, relative to a first ^p R ^b of a bandwidth by the upper layer parameter DL-BWP-loc or UL-BWP -loc.

◦ For the primary cell downlink, the first PRB of the bandwidth is the first RPB of the SS / PBCH block used by the UE for initial cell selection;

◦ For the primary cell uplink for paired spectrum operation, the first PRB of the bandwidth is the first PRB of the UL bandwidth indicated by SystemInformationBlockType1;

◦ For the primary cell uplink for unpaired, the first PRB of the bandwidth is the first PRB of the SS / PBCH block used by the U ^e for initial cell selection;

◦ For a secondary or carrier cell, the first PRB of the DL bandwidth or UL bandwidth is indicated to the UE by the upper layer setting for the secondary or carrier cell.

For each DL BWP in a set of DL BWPs in the primary cell, a UE may configure sets of control resources for each type of common search space and for UE-specific search space as described in subclause 10.1. The UE is not expected to be configured without a common search space on the PCell, or the PSCell, in the active DL BWP.

For each UL BWP in a UL BWP set, the UE configures resource sets for PUCCH transmissions as described in subclause 9.2.

A UE receives PDCCH and PDSCH in a DL BWP according to a configured subcarrier space and CP length for the DL BWP. A UE transmits PUCCH and PUSCH in a UL BWP according to a configured subcarrier space and CP length for the UL bWp.

If a bandwidth path indicator field is configured in DCI 1_1 format, the bandwidth path indicator field value indicates the active DL BWP, from the set of configured DL BWPs, for DL receptions . If a bandwidth path indicator field is configured in DCI 0_1 format, the bandwidth path indicator field value indicates the active UL BWP, from the set of configured UL BWPs, for transmissions of UL.

For the primary cell, a UE may be provided by the Default-DL-BWP upper layer parameter with a default DL BWP among the configured DL BWPs. If a UE is not provided a default DL BWP by the Default-DL-BWP upper layer parameter , the default BWP is the initial active DL BWP.

A UE can be provided by the upper layer parameter BWP-lnactivityTimer with a timer value for the primary cell, as described in [11, TS 38.321] and then the UE starts the timer each time the UE detects a DCI format 1_1 indicating an active DL BWP, other than the default DL BWP, for matched spectrum operation or whenever the UE detects DCI format 1_1 or DCI format 0_1 indicating an active DL BWP or UL bWp , other than the default DL BWP or UL BWP, for unpaired spectrum operation. The UE increases the timer every 1 millisecond interval for carrier frequencies smaller than or equal to 6 GHz or every 0.5 millisecond interval for carrier frequencies greater than 6 GHz if the UE does not detect any DCI 1_1 format for unpaired spectrum operation or if the UE does not detect no DCI 1_1 format or DCI 0_1 format for a matched spectrum operation during the interval. The timer expires when the timer equals the value of BWP-lnactivityTimer. The UE switches to the default DL BWP from an active DL BWP when the timer expires.

If a UE is configured for a secondary cell with upper layer parameter Default-DL-BWP indicating a default DL BWP among the configured DL BWPs and the UE is configured with upper layer parameter BWP-lnactivityTimer indicating a timer value, the UE procedures in the secondary cell are the same as in the primary cell using the timer value for the secondary cell and the default DL BWP for the secondary cell.

If the UE is configured by the Active-BWP-DL-SCell upper layer parameter a first active DL BWP and by the Active-BWP-UL-SCell upper layer parameter a first active UL BWP in a secondary or carrier cell the UE uses the DL BWP BWP indicated and U ^l indicated in the secondary cell as the respective first BWP active DL and UL active BWP in secondary or carrier cell.

For matched spectrum operation, a UE is not expected to transmit HARQ-ACK if the UE changes its active UL BWP between a time of a detection of a DCI 1_1 format and a time of a corresponding HARQ-ACK transmission.

A UE is not expected to monitor PDCCH when the UE performs measurements on a bandwidth that is not within the DL BWP for the UE.

In 3GPP R1-1721344, PDSCH receive spatial association is described as follows. 5.1.5 Quasi-colocation of antenna ports

The UE can be configured up to M TCI-States by higher layer signaling to decode PDSCH according to a PDCCH detected with DCI intended for the UE and the given serving cell in which M depends on the UE capacity. Each configured TCI state includes a set of RS TCI-RS-SetConfig. Each TCI-RS-SetConfig contains parameters to configure a quasi-collocation relationship between the reference signals in the RS set and the group of DM-RS ports of the PDSCH. The RS set contains a reference to either one or two Dl RSs and an associated Quasi Co-Location (QCL-Type) type for each configured by the QCL-Type upper layer parameter . For the case of two RS of DL, the type of QCL will not be the same, regardless of whether the references are for the same RS of DL or different RS of DL. The quasi-co-location types indicated to the UE are based on the upper layer parameter QCL-Type and can take one or a combination of the following types:

- QCL-TypeA: {Doppler shift, Doppler spread, average delay, lag spread} - QCL-TypeB: {Doppler shift, Doppler spread}

- QCL-TypeC: {Average delay, Doppler shift}

- QCL-TypeD: {spatial RX parameter}

The UE receives a select command [10, TS 38.321] used to map up to 8 TCI states to the code points of the DCI TCI-states field. Until a UE receives higher layer configuration of TCI states and prior to receipt of the trigger command, the UE may assume that the antenna ports of a PDSCH DM-RS port group of a serving cell are quasi-located spatially with the SSB determined in the initial access procedure. When the number of TCI states in TCI-States is less than or equal to 8, the DCI TCI-states field directly indicates the TCI state.

If a UE is configured with the upper layer parameter TCI-PresentlnDCI set to 'Enabled' for the CORESET scheduling the PDSCH, the UE assumes that the TCI field is present in the DL DCI of the PDCCH transmitted on the CORESET. If TCI-PresentlnDCI is set to 'Disabled' for the CORESET scheduling the PDSCH, to determine PDSCH quasi antenna port co-location, the UE assumes that the TCI state for the PDSCH is identical to the applied TCI state for the CORESET used for PDCCH transmission. If the TCI-PresentinDCI is set to 'Enabled', the UE will use the TCI-States according to the value of the 'Transmission Configuration Indication' field in the PDCCH detected with DCI to determine PDSCH antenna port quasi co-location. The UE may assume that the antenna ports of a PDSCH DM-RS port group of a serving cell are quasi-located with the RS (s) in the RS set with respect to the QCL-type parameter (s) provided by the TCI status indicated if the offset between the receipt of the DL DCI and the corresponding PDSCH is equal to or greater than a Threshols-Sched-Offset threshold, where the threshold is for further study. For both the case where TCI-PresentlnDCI = 'Enabled' and TCI-PresentlnDCI = 'Disabled' If the offset is less than a threshold, the UE can assume that the antenna ports of a group of PDSCH DM-RS ports of a serving cell are quasi-located based on the TCI state used for PDCCH quasi-location indication of the smallest CORESET-ID in the last interval in which one or more CORESETs are configured to the EU.

As discussed in 3GPP R1-1801155, a UE can be configured to monitor PDCCH carrying a DCI indicating more than one Preference Indication (PI) for different cell. Also, the bandwidth-activated part (BWP) of the UE in each cell may have different subcarrier space. The configured PI monitoring periodicity depends on the activated bWp subcarrier space (SCS) of a configured serving cell.

11.2 Discontinuous transmission indication

If an upper layer parameter Preemp-DL and Preemp-DL = ON is provided to a UE , the UE is configured with an INT-RNTI provided by the upper layer parameter INT-RNTI to monitor PDCCH carrying DCI format 2_1 [5 , TS 38,212]. The UE is additionally configured:

- set or sets of control resources and respective sets of search space for monitoring PDCCH in DCI 2_1 format as described in subclause 10.1;

- a set of serving cells using the upper layer parameter INT-cell-to-INT;

- a mapping for each serving cell in the set of serving cells to a field in DCI 2_1 format by the upper layer parameter cell-to-INT;

- an information payload size for DCI 2_1 format using the upper layer parameter INT-DCI-payload-length;

- a monitoring periodicity for PDCCH in DCI 2_1 format using the upper layer parameter INT-monitoring-periodidty

- an indication granularity for time-frequency resources by the INT-TF-unit upper layer parameter for each serving cell in the set of serving cells.

If a UE detects a DCI 2_1 format for an active DL BWP of a serving cell from the configured set of serving cells, the UE may assume that no transmission is present to the UE in PRB and in symbols excluding SS block / PBCH if present, from a set of PRBs in the active DL BWP and a set of symbols from the last supervision period, which are indicated by a respective field in the DCI format according to the correlation for each cell service cells in the service cell set provided by the cell-to-INT upper layer parameter . A UE is not expected to take into account the indication by the DCI 2_1 format detected in a DL BWP for a PDSCH scheduled in a different DL BWP of the same serving cell.

The PRB set equals the active DL BWP as defined in subclause 12 and includes S ^int PRB. If a UE detects a DCI 2_1 format on a PDCCH transmitted on a set of control resources in the mTiNT interval, the set of symbols indicated by a field in DCI 2_1 format includes the last% / interval and ~ PlNT

'l ,: i'^'■ “symbols before the first symbol of the control resource set in the interval it -T ^int ¡rrintervab

where ^{T int} is the value of the INT-monitoring-periodicity parameter and m is a natural number, ^{'s im b and} m are the number of OFDM symbols within an interval and the subcarrier space configuration respectively for an associated serving cell with the respective field in the detected DCI 2_1 format, miNT is the subcarrier space configuration of the DL BWP of the serving cell in which the DCI 2 1 format is detected.

If the UE is configured with the UL-DL-configuration-common upper layer parameter , symbols indicated as \ r interval and. ~ Mmr

Uplinked by UL-DL-configuration-common symbols before the first symbol of the control resource set in the interval ⁱ t -T ^int are excluded from symbol INT. The resulting set of symbols includes a number of symbols indicated as N ^int .

The UE configures the indication granularity for the PRB set and for the symbol set using the upper layer parameter INT-TF-unit.

If the value of INT-TF-unit is 0, 14 bits of a field in DCI 2_1 format have a one-to-one mapping with ^{14 consecutive symbol groups from the symbol set where each of the first Nint-} I ^{_Nint / 14_} | ^{-14 groups of symbols includes} T ^{Nint / 14} 1 ^{symbols, each of the last 14- Nint +} _ ^{Nint / 14} _ ^{-14 groups of symbols} includes _N ^int / 14_ symbols, a bit value of 0 indicates transmission to the UE in the corresponding symbol group and a bit value of 1 indicates no transmission to the UE in the corresponding symbol group.

If the value of INT-TF-granularity is 1, 7 bit pairs of a field in the DCI 2_1 format have a one-to-one correlation with 7 groups of consecutive symbols in which each of the first N ^int -_N ^int / 7_-7 groups of ^{symbols includes} | ^{~ Mnt / 7} 1 ^{symbols, each of the last 7 - Mnt-} I ^{_Mnt / 7_} | ^{-7 groups of symbols includes} L ^{Nint / 7} _ ^{symbols, a first bit in a pair of bits for a group of symbols is applicable to the subset of} T ^{Sint / 2} 1 ^first PRBs of the set of S ^int PRB, a second bit in the Bit pair for the symbol group is applicable to ^{the last} L ^{Sint / 2} _ ^{PRB subset of the PRB Sint set, a bit value of 0 indicates transmission to the UE in the} corresponding symbol group and PRB subset, and a Bit value of 1 indicates no transmission to UE in corresponding symbol group and PRB subset.

A UE is not required to monitor DCI 2_1 format in it -Tint interval in case PDSCH is not detected in any serving cell configured by the upper layer parameter INT-cell-to-INT within the last «/ interval

■ 'I' T ^int Tint symbols before the first symbol of the control resource set in the interval m-Tint. Any of the following terminology and assumption can be used:

• BS: a central unit network or a network node in NR that could be used to control one or multiple TRPs that are associated with one or multiple cells. Communication between BS and TRP could be through frontal term. BS can be referred to as Central Unit (CU), eNB, gNB or NodeB.

• TRP: a transmission and reception point could provide network coverage and could directly communicate with UE. TRP can be referred to as a distributed unit (DU) or network node.

• Cell: a cell could be made up of one or multiple associated TRPs, that is, cell coverage is made up of coverage of all associated TRPs. A cell could be controlled by a BS. Cell can be referred to as TRP group (TRPG).

• NR-PDCCH: a channel carries downlink control signal that could be used to control communication between a UE and a network side. A network could transmit NR-PDCCH in configured control resource set (CORESET) to the UE.

• UL control signal: a UL control signal can be a Scheduling Request (SR), a channel status information (CSI), or a HARQ-ACK (Hybrid Repeat Automatic Request Acknowledgment) / NACK (Negative Acknowledgment) for downlink transmission.

• Interval: An interval could be a planning unit in NR (New RAT). An interval duration could be 14 symbols of OFD ^m (Orthogonal Frequency Division Multiplexing).

• Mini-slot: a mini-slot could be a scheduling unit with duration less than 14 OFDM symbols.

• Interval Format Information (SFI): Symbol interval format information in a range. A symbol in a range can be of the following type: downlink, uplink, floppy, or other. The slot format of a slot could at least carry transmission address of symbols in the slot.

• DL Common Signal (Downlink): A DL Common Signal could be a data channel carrying common information that is directed for multiple UEs in a cell or all UEs in a cell. Examples of DL common signal could be system information, paging or RAR.

• DL URLLC (Ultra Reliable and Low Latency Communications) - A type of DL transmission that requires very high reliability and very low latency. To meet the latency requirement, an example is transmitting DL URLLC in a mini slot, for example the data duration could be less than 1 slot such as 1 ~ 4 symbol or OFDM symbols and there may be one or multiple occasions of monitoring for DL URLLC control in an interval. In this example, a UE is configured with a CORESET to monitor DL URLLC control indicating DL URLLC transmission. CORESET can be configured in intermediate symbols of a range. The DL URLLC stream can be streamed in the next few CORESET symbols.

In a wireless communication system, the radio resource utilization efficiency is important for NW to plan UE with multiple and / or different services. In NR 5G, multiple services with different requirements are expected to be supported. Services could be broadly classified as services that require very low latency and high reliability (i.e., URLLC), services that require very high data rates (i.e., Enhanced Mobile Broadband (eMBB)), or services with enhanced coverage (i.e. i.e. Mass Machine Type Communication (mMTC)). However, different services mentioned above may need different lengths of time and / or different subcarrier spaces (SCS). For example, it is beneficial to transmit on a lower number of OFDM symbols and / or transmit through a higher SCS value to meet URLLC requirements, but, for other services, latency is not the highest priority.

From a NW point of view, you need to consider how to multiplex different services with different requirements in an efficient way. One way is through a FDM (frequency division multiplexing) way. NW can schedule services with different QoS requirements on different frequency resources. But, NW may encounter a problem that there are not enough frequency resources available and / or enough for some. For example, delay-sensitive services (ie, URLLC) can be streamed on resources with a higher SCS that can occupy many more frequency resources to meet the latency requirement. In some situation (i.e. narrow system bandwidth, services with much higher delay tolerance relative to delay sensitive services), multiplexing of services with different QoS requirements in a FDM manner is not suitable.

One way could be through a TDM (time division multiplexing) way. NW can schedule different services at different times. However, considering delay sensitive services, waiting for the next transmission occasion in a TDM manner may not satisfy the requirement for delay sensitive services. Therefore, it is considered to allow a delay sensitive service to prioritize over delay tolerant services. For example, when data arrives from a delay-sensitive service, NW may prioritize scheduling the delay-sensitive service on resources that have been scheduled for delay-tolerant services. NW can drill data or information into resources already planned for delay tolerant services.

Therefore, the concept of indication of preference (PI) is introduced. NW could indicate PI (Indication of Preference) to UE with delay tolerant services to compensate for retransmission reception performance. Some detailed procedures related to PI are mentioned in 3GPP R1-1721343. In case a UE is configured to monitor common group PDCCH to receive PI, receiving PI can help the UE to discard and / or ignore transmission partial impacted by delay sensitive services that may be scheduled for another or other UEs. Considering retransmission with combination of chasing, discarding and / or ignoring partial impacted from the previous / first transmission can improve encoding performance. Based on the final report of 3GPP TSG RAN WG1 # AH_NR2, PI is carried over a common group PDCCH. Different common group PDCCHs can indicate different PIs. In the current NR PHY standard a common group PDCCH carrying downlink control information in DCI 2_1 format could comprise one or more than one PI. Additionally, each PI can represent a configured serving cell. Based on mapping configured for serving cell (s) and a field in DCI format 2_1 downlink control information, a UE could know the association between PI and serving cell.

Based on the text proposal approved in 3GPP R1-1801155, to indicate PI of a first serving cell with different subcarrier space (SCS), the UE could interpret a PI of the first serving cell based on SCS of the first cell service and SCS of a second service cell in which the UE receives the downlink control information. Note that the second serving cell may be the first serving cell if UE receives the downlink control information for the first cell in the first cell. For example, a UE could be configured to receive DCI 2_1 formatted Downlink Control Information in a first serving cell with 1 periodicity interval indicating two PIs in which a PI is for the first serving cell and the another PI is for a second serving cell. If the first serving cell's activated downlink BWP SCS is 30 kHz while the second serving cell's activated downlink BWP SCS is 15 kHz, PI for the first serving cell indicates 14 OFDM symbols with SCS of 30 kHz while PI for the second serving cell indicates 7 OFDM symbols with 15 kHz. OFDM symbols indicated by both PIs are before the first OFDM symbol of a control resource set (CORESET) for monitoring downlink control information. However, in some cases, within a PI monitoring periodicity, it may comprise OFDM symbol part due to different SCS and / or different cyclic prefix length (CP) between the first serving cell and the second serving cell. . Therefore, it can be a problem how the UE interprets a PI when parts of OFDM symbols are included in the PI monitoring periodicity.

In an example illustrated by Figure 11, if activated downlink BWP SCS of a first serving cell to receive DCI 2_1 format downlink control information is 60 kHz with PI monitoring period slot 1 and SCS of Activated downlink BWP of a second serving cell is 15 kHz, the UE may be confused that if PI for the second cell received in the second 60 kHz slot may indicate OFDM symbol # 3 or not, as part of OFDM symbol # 3 falls within one monitoring periodicity and the other part of OFDM symbol # 3 falls within the other monitoring periodicity. In another example, in case of extended cyclic prefix (ECP), a downlink BWP's range boundary with ECP from one serving cell may not align with normal cyclic prefix (NCP) on another serving cell. Furthermore, according to the text proposal approved in 3GPP R1-1801155, a UE is not required to monitor format of DCI2_1 if there is no PDSCH detected / decoded / scheduled in previous monitoring periodicity. However, if OFDM symbol part is taken into account within PI monitoring periodicity, how the UE handles the above issues needs to be resolved. Potential solutions are described below.

Two general concepts of the present invention are described as follows. The first general concept is that there is a restriction in the configuration of receiving multiple service cell PIs in one DCI (Downlink Control Information). The UE is not expected to process and / or count OFDM symbol part within PI monitoring periodicity. The second general concept is that if a UE receives a DCI comprising at least one PI indicating OFDM symbol part within PI monitoring periodicity, how does the UE handle this case.

In one embodiment, a UE may be configured with a set of serving cell or cells. The UE may be configured with a periodicity to monitor a downlink control information in a first serving cell indicating preference indication (PI) of a second serving cell in the set. The periodicity may be configured with a restriction that the periodicity comprises integer numbers of OFDM symbol or symbols in the second cell. For example, if a UE receives one or more DCIs in a first serving cell indicating a PI for the first serving cell with 60 kHz SCS and / or a PI for a second serving cell with 15 kHz SCS, the UE can be configured by a base station with a periodicity of 2 slots to receive the DCI in the first cell. In this example, using the periodicity 2 slots with SCS 60 kHz, the number of OFDM symbols with SCS 15 kHz within the periodicity is 7.

In another example, a base station does not set a UE a 1-slot periodicity to receive the DCI in the first cell if the base station transmits one or more DCIs to the UE in a first serving cell indicating a PI for the first cell. service cell with 60 kHz SCS and / or a PI for a second service cell with 15 kHz SCS. A UE is not expected to receive a 1-slot periodicity configuration to receive the DCI in a first cell if the UE receives / monitors one or more DCIs in the first serving cell indicating a PI for the first serving cell with 60 kHz SCS and / or a PI for a second serving cell with 15 kHz SCS. The constraint can help the number of OFDM symbol or symbols within the periodicity to be an integer.

Preferably, the first serving cell may be configured with a restriction that the periodicity comprises an integer of OFDM symbol or symbols. The first serving cell can be configured as a serving cell comprising the lowest value of SCS. For example, possible BWP SCS configured in a first serving cell are 15 kHz, 30 kHz while possible BWP SCS configured in a second serving cell are 15 kHz, 60 kHz. In this example, to avoid non-integer of OFDM symbol (s) within a configured periodicity, the first serving cell can be configured so that the UE receives downlink control information comprising two PIs for the two serving cells.

Alternatively, the restriction could be that the highest SCS value of a serving cell configured to receive DCI is less than or equal to twice the lowest SCS between serving cell or cells in the set. The restriction could also be that when SCS of activated BWP of the first serving cell is 15 kHz and SCS of activated BWP of the second serving cell is 60 kHz, the UE is not expected to receive DCI indicating two PIs in the second serving cell with 1-slot monitoring periodicity for the DCI.

Alternatively, the restriction could be that when SCS of activated BWP of the first serving cell is 15 kHz and SCS of activated BWP of the second serving cell is 60 kHz, the UE receives DCI indicating a PI for the second serving cell. service in the second serving cell with monitoring periodicity of 1 slot. For example, possible BWP SCS configured in a first serving cell are 15 kHz, 30 kHz while possible BWP SCS configured in a second serving cell are 15 kHz, 60 kHz and possible BWP SCS configured in a third serving cell it is 120 kHz. In this example, since the highest SCS value of the first 30 kHz serving cell can be equal to two times the lowest SCS value, the first serving cell can be configured for the UE to monitor DCI comprising three PIs with 1 configured recurrence interval. If the second serving cell is configured for the UE to monitor DCI comprising two PIs with 1 configured periodicity interval, 3.5 OFDM symbols can occur in 1 interval when the second serving cell's activated BWP SCS is 60 kHz and activated BWP SCS of the first serving cell is 15 kHz. Similarly, if the third serving cell is configured for the UE to monitor DCIs comprising three PIs, the SCS value of the third serving cell may not satisfy the restriction.

In a similar example, possible BWP SCS configured in a first serving cell are 15 kHz, 60 kHz while possible BWP SCS configured in a second serving cell are 15 kHz, 60 kHz. In this example, both the first and second serving cells cannot satisfy the restriction, the UE needs to be configured with a periodicity to satisfy that whole number of OFDM symbols within the periodicity. Alternatively, in this example, a restriction could be applied that the DCI indicating two PIs for these two serving cells occurs when both the activated BWP SCS of the first serving cell and the second serving cell are the same. Additionally, if activated BWP SCS of both serving cells are different, the UE can ignore / discard PI for the first / second serving cell when the UE receives DCI indicating two PIs in the second / first serving cell with 1 slot of periodicity.

Preferably, the UE is not expected to deal with the case where the OFDM symbol or symbols within the periodicity is not an integer. If the UE receives a PI indicating the periodicity comprising a non-integer of OFDM symbol or symbols, the UE may ignore the PI. Alternatively, the UE can ignore part of PI. From the perspective of a base station or NW, when the base station or NW configures UE a periodicity to receive DCI comprising multiple PIs from the UE serving cell, the NW may jointly determine the periodicity and which serving cell of the UE to receive DCI comprising PIs for multiple serving cells to satisfy the restriction.

In one embodiment, a UE could be configured with a set of serving cell or cells. The UE could be configured with periodicity to monitor downlink control information in a first serving cell indicating preference indication (PI) of a second serving cell in the set. The periodicity may depend on the SCS of an activated BWP of the first serving cell. The periodicity may comprise a set of OFDM symbols. The size of the OFDM symbol set depends on the SCS of an activated BWP of the second serving cell in the serving cell set. For example, assuming that SCS of an activated BWP of a first serving cell is 60 kHz, SCS of an activated bWp of a second serving cell is 15 kHz and the configured periodicity is 1 slot, if the UE is configured to receive a or several DCIs comprising two PIs in a first serving cell every 1 periodicity interval, the number of OFDM symbol or symbols with 15 kHz SCS within the periodicity is 3.5 and the number of OFDM symbol or symbols with 60 kHz SCS within the periodicity is 14. The UE may ignore an OFDM symbol with partial symbol duration. For example, suppose that SCS of an activated BWP of a first serving cell is 60 kHz, SCS of an activated BWP of a second serving cell is 15 kHz and if the UE is configured to receive one or more DCIs comprising two PIs in a first serving cell every 1 periodicity interval, the PI corresponding to 15 kHz SCS indicates resource for 3 OFDM symbols. More specifically, the UE may ignore an OFDM symbol with partial symbol duration when the UE counts how many full OFDM symbols or symbols exist within the periodicity.

Alternatively, if an OFDM symbol with partial symbol duration is at the beginning of the periodicity, the UE may include the OFDM symbol. If the OFDM symbol with partial symbol duration is in the last part of the periodicity, the UE may ignore the OFDM symbol. More specifically, the UE may ignore an OFDM symbol with partial symbol duration when the UE counts how many full OFDM symbols exist within the periodicity. For example, suppose that SCS of an activated BWP of a first serving cell is 60 kHz, SCS of an activated BWP of a second serving cell is 15 kHz and if the UE is configured to receive one or more DCIs comprising two PIs in a first serving cell every 1 interval of periodicity, the PI corresponding to 15 kHz SCS indicates resource for 3 OFDM symbols in one or some intervals and indicates resource for 4 OFDM symbols in one or more other intervals. Alternatively, the UE may assume that two bits in the two DCIs indicating PI for an OFDM symbol would indicate the same value. The same value can be 1 or 0. One of the two bits would indicate PI for a first part of the OFDM symbol and the other of the two bits would indicate PI for a second part of the OFDM symbol.

Preferably, the UE may not be expected to receive two DCIs in which two bits in the two DCIs indicating PI for an OFDM symbol would indicate different values. A base station could transmit two DCIs to a UE where two bits in the two DCIs indicate PI for an OFDM symbol, and the base station could set the same value for the two bits. For example, suppose that SCS of an activated BWP of a first serving cell is 60 kHz, SCS of an activated BWP of a second serving cell is 15 kHz and if a UE is configured by a base station to receive one or more DCIs comprising two PIs in a first serving cell every 1 periodicity interval, the PI corresponding to 15 kHz SCS indicates resource for 3.5 OFDM symbols. A first bit in a first DCI would indicate PI for half an OFDM symbol and a second bit in a second DCI would indicate PI for the other half of the OFDM symbol.

Preferably, the UE may not be expected to receive the two DCIs in which the first bit and the second bit are set to different values. The base station would set the same value for the first bit and the second bit. Alternatively, two bits in the two DCIs that indicate PI for an OFDM symbol could indicate different values (eg, a first value and the second value). A UE could determine whether or not a corresponding resource in the OFDM symbol is transmitted based on the different values. If either bit is set to 1, the UE determines that the corresponding resource in the OFDM symbol is not transmitted. If both of the two bits are set to 0, the UE determines that the corresponding resource in the OFDM symbol is transmitted. Alternatively or additionally, if both of the two bits are set to 1, the UE determines that the corresponding resource in the OFDM symbol is not transmitted.

If either bit is set to 1, the UE could determine that the corresponding resource in the OFDM symbol is transmitted. For example, suppose that SCS of an activated BWP of a first serving cell is 60 kHz, SCS of an activated BWP of a second serving cell is 15 kHz and if a UE is configured by a base station to receive one or more DCIs comprising two PIs in a first serving cell every 1 periodicity interval, the PI corresponding to 15 kHz SCS indicates resource for 3.5 OFDM symbols. A first bit in a first DCI would indicate PI for half an OFDM symbol and a second bit in a second DCI would indicate PI for the other half of the OFDM symbol. The UE could determine whether or not the corresponding resource in the OFDM symbol is transmitted based on a first value of the first bit and a second value of the second bit.

If either of the first bit and the second bit are set to 1, the UE could determine that the corresponding resource in the OFDM symbol is not transmitted. If both the first bit and the second bit are set to 0, the UE determines that the corresponding resource in the OFDM symbol is transmitted. Alternatively or additionally, if both the first bit and the second bit are set to 1, the UE determines that the corresponding resource in the OFDM symbol is not transmitted. If either of the first bit and the second bit are set to 1, the UE determines that the corresponding resource in the OFDM symbol is transmitted.

In the case that at least one OFDM symbol with partial symbol duration exists within the periodicity, the UE may ignore the OFDM symbol when the UE determines whether there is a transmitted PDSCH in the OFDM symbol. For example, in Figure 13, the UE may not be required to monitor (or not monitor) DCI on the fifth monitoring occasion since the UE may ignore OFDM symbol with half symbol duration in the second serving cell. The DCI can comprise two PIs. The UE may not be required to monitor (or not monitor) DCI on the fifth monitoring occasion even if there is PDSCH detected / decoded / scheduled in a monitoring periodicity prior to the fifth monitoring occasion. The PDSCH detected / decoded / scheduled in a previous monitoring periodicity of the fifth monitoring occasion comprises half of an OFDM symbol.

Alternatively, in case at least one OFDM symbol with partial symbol duration exists within the periodicity, the UE may include the OFDM symbol when the UE determines whether PDSCH is transmitted in the OFDM symbol. Additionally, in case that at least one OFDM symbol with partial symbol duration exists within the periodicity, the UE may include the OFDM symbol if the OFDM symbol is at the beginning of the periodicity when the UE determines if PDSCH exists. transmitted in OFDM symbol. In case that at least one OFDM symbol with partial symbol duration exists within the periodicity, the UE may ignore the OFDM symbol if the OFDM symbol is in the last part of the periodicity when the UE determines if PDSCH exists. transmits at the OFDM symbol. For example, in Figure 13, since the UE may know that there is PDSCH transmission in the second serving cell, the UE may monitor a DCI comprising one or more PIs on the fifth monitoring occasion.

However, in Figure 14, the UE may skip the supervision of a DCI comprising one or more PIs on the fourth supervision occasion. The UE may not be required to monitor (or not monitor) DCI on the fourth monitoring occasion even if there is PDSCH detected / decoded / scheduled in a monitoring periodicity prior to the fourth monitoring occasion. The PDSCH detected, decoded or scheduled in a previous monitoring periodicity of the fourth monitoring occasion comprises half an OFDM symbol. The UE may not know that there is PDSCH transmission in the second serving cell on the fourth monitoring occasion. Alternatively, in case at least one OFDM symbol with partial symbol duration exists within the periodicity, the UE may include the OFDM symbol if the UE is aware that there is PDSCH in the OFDM symbol when the UE determines if there is PDSCH it is transmitted in the OFDM symbol. In case at least one OFDM symbol with partial symbol duration exists within the periodicity, the UE may ignore the OFDM symbol if the UE is not aware that there is PDSCH in the OFDM symbol when the UE determines if it exists PDSCH transmitted in OFDM symbol.

In one embodiment, a UE could be configured with a set of serving cell or cells. The UE can be configured with PI for each serving cell in the set. The UE could be configured with monitoring periodicity for each serving cell in the set. In an example illustrated by Figure 12, a UE could be configured with two monitoring periodicities for two serving cells which are 1 slot with 60 kHz SCS for the first serving cell and 1 slot with 15 kHz SCS for the second cell. of service. The UE monitors a downlink control information comprising two PIs for two serving cells every 1 slot with 15 kHz SCS, while the UE monitors a downlink control information comprising one PI for the first serving cell in three additional internal oversight occasions. In this example, if the UE receives a downlink control information with a first payload size,

((/interval

PI for the first cell is applied in the last ^{■ 'symbols ■ 7, nt} symbols of OFDM with SCS 60 kHz within 1 í.Hinterval

SCS 60 kHz interval while PI for the second cell is applied in the last symbols ^{T int} OFDM symbols with 15 kHz within 1 15 kHz SCS interval before the first OFDM symbol of a set of control resources to receive the downlink control information with the first payload size.

Additionally, if the UE receives the DCI with a second payload size indicating PI for the first serving cell in the first serving cell, PI for the first serving cell can be applied in the last i / intervab

'T ^int OFDM symbols with 60 kHz SCS within 1 60 kHz SCS before the first OFDM symbol of a set of control resources to receive the downlink control information with the second payload size. The UE may not be required to monitor the downlink control information with the first payload size in case no PDSCH is detected within the last .. ^ interval

^{• 's im b T int} OFDM symbols with 60 kHz SCS in the first serving cell and / or within the last ^ interval

^{■ ii} 1 T ^int OFDM symbols with 15 kHz SCS in the second serving cell. Also, it may not the UE being required to monitor the downlink control information with the second payload size, and, -interval

in case no PDSCH is detected within the last ^{'simb -T int} OFDM symbols with 60 kHz SCS in the first serving cell.

Preferably, according to the invention, the text proposed in 3GPP R1-1801155 could be rewritten as follows (first text proposal):

Alternatively, according to the invention, the text proposed in 3GPP R1-1801155 could be rewritten as follows (second text proposal):

Additionally as an alternative, according to the invention, the first proposed text could be rewritten as follows:

____________________________________________________________________________________________ If a UE detects a DCI 2_1 format on a PDCCH transmitted in a set of control resources in the interval ^{m -T iN T,} the set of symbols indicated by a field in DCI 2_1 format includes the last 14-T ^{i nt- 2 m - wnt} symbols before the first symbol of the control resource set in the interval ^{it iT int} where T ^int is the value of the upper layer parameter iNT-monitoring-periodicity, m is the subcarrier space setting for a serving cell correlated with a respective field in the DCI 2_1 format, miNT is the DL BWP subcarrier space configuration in which the UE receives the PDCCH carrying the DCI 2_1 format and m is a natural number.

If the UE is configured with the upper layer parameters UL-DL-configuration-common or UL-DL-configurationcommon-SET2, symbols indicated as uplink by UL-DL-configuration-common or UL-DL-configuration-common-SET2 are excluded from the last '] ⁴ T \ m- ² m-'r! iNT symbols before the first symbol of the control resource set in the interval ^{m - T i NT.} If the symbol set comprises at least one symbol with partial symbol duration, the symbol is excluded from the last 14TiNr2'n- ™ r symbols before the first symbol of the control resource set in the interval mT ^iNT . If the symbol set comprises at least one symbol with partial symbol duration that is at the beginning of the set, the symbol is included from the last ^{14-T int} symbols before the first symbol in the set of resources.

Figure 15 is a flow chart 1500 in accordance with an illustrative embodiment from the perspective of a UE. In step 1505, the UE receives a configuration that the UE communicates with a first serving cell and a second serving cell. In step 1510, the UE receives a setting of a periodicity to monitor a downlink control signal in the first serving cell, wherein the periodicity includes an integer of symbol or symbols from the second serving cell, and wherein the downlink control signal includes a preference indication (PI) for the second serving cell.

Preferably, the UE may not expect to receive a configuration such that the periodicity includes a non-integer symbol or symbols from the second serving cell. The number of symbols in the second serving cell could be a number of symbol or symbols indicated by the PI for the second serving cell. Additionally or alternatively, the number of symbols of the second serving cell within the periodicity could depend on the subcarrier space (SCS) of an activated bandwidth portion (BWP) of the second serving cell.

Preferably, if the first serving cell is configured with 60 kHz subcarrier space and the second serving cell is configured with 15 kHz subcarrier space, the UE could be configured by a base station with a periodicity of 2 slots or 4 slots to receive the DCI in the first serving cell. Additionally or alternatively, if the first serving cell is configured with 60 kHz subcarrier space and the second serving cell is configured with 15 kHz subcarrier space, the UE may not expect to receive a configuration of a periodicity with 1 slot to receive the DCI in the first serving cell.

Preferably, the downlink control signal could include a PI for the first serving cell. Referring back to Figures 3 and 4, in an illustrative embodiment of a UE, device 300 includes program code 312 stored in memory 310. CPU 308 could execute program code 312 to enable UE (i ) receive a configuration that the UE communicates with a first serving cell and a second serving cell, and (ii) receive a configuration of a periodicity to monitor a downlink control signal in the first serving cell, at the that the periodicity includes an integer of symbol or symbols from the second serving cell, and wherein the downlink control signal includes a preference indication (PI) for the second serving cell. Additionally, CPU 308 can execute program code 312 to perform all the actions and steps previously described or others described in this document.

Figure 16 is a flow chart 1600 in accordance with an illustrative embodiment of a base station. In step 1605, the base station configures a UE with a first serving cell and a second serving cell. In step 1610, the base station configures the UE with a periodicity to monitor a downlink control signal in the first serving cell, in which the base station is not allowed to configure the UE such that the periodicity comprises a non-integer number of symbol or symbols of the second serving cell, and wherein the downlink control signal comprises a preference indication (PI) for the second serving cell.

Preferably, the number of symbols of the second serving cell within the periodicity could be dependent on a subcarrier space (SCS) of activated bandwidth part (BWP) of the second serving cell. Preferably, if the first serving cell is configured with 60 kHz subcarrier space and the second serving cell is configured with 15 kHz subcarrier space, the base station could configure the UE with a periodicity of 2 slots or 4 slots to receive the DCI in the first serving cell. In addition or alternatively, if the first serving cell is configured with 60 kHz subcarrier space and the second serving cell is configured with 15 kHz subcarrier space, the base station may not configure the UE a periodicity with 1 slot for receive the DCI in the first serving cell.

Preferably, when the base station configures the UE with a periodicity to receive DCI in the first serving cell, the base station jointly determines the periodicity and the first serving cell, such that an integer symbol or symbols of the second cell service are within the periodicity.

Additionally or alternatively, when the base station configures the UE with a periodicity to receive DCI in the first serving cell, the base station could jointly determine the periodicity and subcarrier space (s) that are configured for the first serving cell and the second serving cell, such that an integer symbol or symbols of the second serving cell are within the periodicity. Additionally or alternatively, when the base station configures the UE with a periodicity to receive DCIs in the first serving cell, the base station jointly determines the periodicity and whether to configure the UE to monitor two PIs in one serving cell.

Preferably, the downlink control signal could include a PI for the first serving cell. Referring back to Figures 3 and 4, in an illustrative embodiment of a base station, device 300 includes program code 312 stored in memory 310. CPU 308 could execute program code 312 to enable the base station (i) configure a UE with a first serving cell and a second serving cell, and (ii) configure the UE with a periodicity to monitor a downlink control signal in the first serving cell, where no allows the base station to configure the UE such that the periodicity comprises a non-integer symbol or symbols from the second serving cell, and wherein the downlink control signal comprises a preference indication (PI) for the second serving cell. Additionally, CPU 308 can execute program code 312 to perform all the actions and steps previously described or others described in this document.

Figure 17 is a flow chart 1700 in accordance with an illustrative embodiment of a UE. In step 1705, the UE is configured with a set of serving cell or cells. In step 1710, the UE is configured with a periodicity to monitor a downlink control signal in a first cell of the set, in which an integer number of symbol or symbols are within the periodicity, and in which the signal Downlink control includes a Preference Indication (PI) of the serving cell (s) set.

Referring back to Figures 3 and 4, in an illustrative embodiment of a UE, device 300 includes program code 312 stored in memory 310. CPU 308 could execute program code 312 to enable UE (i ) is configured with a set of serving cell or cells, and (ii) is configured with periodicity to monitor a downlink control signal in a first cell of the set, in which an integer number of symbol or symbols are within of periodicity, and wherein the downlink control signal includes a preference indication (PI) of the serving cell or cells set. Additionally, CPU 308 can execute program code 312 to perform all the actions and steps previously described or others described in this document.

Figure 18 is a flow chart 1800 in accordance with an illustrative embodiment of a network node. In step 1805, the network node configures a UE with a set of serving cell or cells. In step 1810, the network node configures the UE with a periodicity to monitor a downlink control signal in a first cell within the set, in which an integer number of symbol or symbols are within the periodicity, and in wherein the downlink control signal includes Preference Indication (PI) of the serving cell or cells set.

Referring back to Figures 3 and 4, in an illustrative embodiment of a network node, device 300 includes program code 312 stored in memory 310. CPU 308 could execute program code 312 to enable the network node (i) configure a UE with a set of serving cell or cells, and (ii) configure the UE with periodicity to monitor a downlink control signal on a first cell within the set, in which a integer symbol or symbols are within periodicity, and wherein the downlink control signal includes Preference Indication (PI) of the serving cell or cells set. Additionally, CPU 308 can execute program code 312 to perform all the actions and steps previously described or others described in this document.

In the context of the embodiments shown in Figures 17 and 18 and described in the text above, preferably, the UE may not be expected to treat that part of a symbol is within periodicity. The network node may not be allowed to configure the UE such that the periodicity comprises a non-integer number of symbol (s). Additionally or alternatively, the UE could be configured with at least a portion of the downlink bandwidth in one cell of the set. Additionally or alternatively, the UE could receive a downlink signal in a downlink BWP in one cell of the set according to a configured subcarrier space and a cyclic prefix length (CP) for the downlink BWP.

Preferably, the symbol duration in a downlink BWP of a cell is determined based on a configured subcarrier space and a cyclic prefix length for the downlink BWP. Additionally or alternatively, a PI could have 14 bits. Additionally or alternatively, the periodicity may be 1 or 2 or 4 slots, where the time duration of a slot depends on SCS and / or CP length of a downlink BWP in the first cell.

Preferably, an interval with a normal cyclic prefix could have 14 symbols. An interval with cyclic prefix extended could have 12 symbols.

Preferably, the first serving cell could have a downlink BWP with higher SCS.

Figure 19 is a flow chart 1900 in accordance with an illustrative embodiment of a UE. In step 1905, the UE receives a Preference Indication (PI) for a period comprising a set of symbol or symbols. Preferably, the period could be a monitoring periodicity of a downlink control information.

In step 1910, the UE ignores a symbol in the set of symbol or symbols, wherein the symbol is with partial symbol duration in the period. Preferably, the UE could be configured with a set of serving cell or cells, wherein the PI is for a serving cell in the set of serving cell or cells. The PI could be transmitted in the downlink control information. Additionally or alternatively, the period could be configured as 1, 2 or 4 intervals to the UE.

Preferably, the UE could monitor the downlink control information in the first cell in each period. A subcarrier space (SCS) of an activated part of the bandwidth in the first cell is preferably 60 kHz. If the UE then monitors the downlink control information in the first cell every 1 slot with 60 kHz SCS, the period comprises 3.5 symbols when the SCS of an activated BWP in a second serving cell is 15 kHz, where the PI could be applied to the second serving cell.

Preferably, the UE could be configured to receive the downlink control information in a first cell of the serving cell set. The downlink control information could include at least one PI for the serving cell or cells. Additionally or alternatively, the downlink control information could be DCI 2_1 format.

Referring back to Figures 3 and 4, in an illustrative embodiment of a UE, device 300 includes program code 312 stored in memory 310. CPU 308 could execute program code 312 to enable UE (i ) receive an indication of preference (PI) for a period comprising a set of symbol or symbols, and (ii) ignore a symbol in the set, where the symbol is with partial symbol duration in the period. Additionally, CPU 308 can execute program code 312 to perform all the actions and steps previously described or others described in this document.

Figure 20 is a flow chart 2000 in accordance with an illustrative embodiment of a UE. In step 2005, the UE receives a preference indication (PI) for a period comprising a set of symbol or symbols. In step 2010, the UE ignores a symbol in the set of symbol or symbols if the symbol is the last symbol in the period; wherein the symbol is with partial symbol duration in the period.

Preferably, if the symbol is the last symbol in the period, the UE could add the symbol in the set of symbol or symbols. Additionally, the UE could be configured with a set of serving cell or cells; wherein the PI is for a serving cell in the set of serving cell or cells. The PI is preferably transmitted in a downlink control information.

Preferably, the UE could be configured to receive the downlink control information in a first cell of the serving cell set. The downlink control information could include at least one PI for the serving cell or cells. The downlink control information could also be DCI 2_1 format.

Preferably, the period could be a monitoring periodicity of the downlink control information. Additionally, the period could be configured as 1, 2, or 4 intervals to the UE.

Preferably, the UE could monitor the downlink control information in the first cell in each period. Additionally, an SCS of a BWP in the first cell could be 60 kHz. If the UE monitors the downlink control information in the first cell every 1 slot with 60 kHz SCS, the period could include 3.5 symbols when a ^b W ^p SCS activated in a second serving cell is 15 kHz , where the PI is applied to the second serving cell.

Referring back to Figures 3 and 4, in an illustrative embodiment of a UE, device 300 includes program code 312 stored in memory 310. CPU 308 could execute program code 312 to enable UE ( i) receive a Preference Indication (PI) for a period comprising a set of symbol or symbols, and (ii) ignore a symbol in the set if the symbol is the last symbol in the period; wherein the symbol is with partial symbol duration in the period. Additionally, CPU 308 can execute program code 312 to perform all the actions and steps previously described or others described in this document.

Various aspects of the disclosure have been described above. It should be apparent that the contents of this document can be incorporated in a wide variety of ways and that any specific structure, function, or both described herein is merely representative. On the basis of the contents in this document, one skilled in the art should appreciate that a disclosed aspect can be implemented independently of any other aspect and that two or more of these aspects can be combined in various ways. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects explained in this document. Furthermore, an apparatus can be implemented or such a method can be practiced using other structure, functionality, or structure and functionality in addition to or other than one or more of the aspects set forth herein. As an example of some of the above concepts, in some respects concurrent channels can be established based on pulse repetition frequencies. In some aspects, concurrent channels can be established based on impulse position or offsets. In some aspects, concurrent channels may be established based on sequences of time jumps. In some aspects, concurrent channels can be established based on pulse repetition frequencies, pulse positions or offsets, and time skip sequences.

Those skilled in the art would understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols and chips that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles or any combination thereof.

Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, processors, media, circuits, and algorithm stages described in connection with the aspects disclosed herein may be implemented as electronic hardware (e.g., a digital implementation, a analog, or a combination of the two, which can be designed using font encoding or some other technique), various forms of program or design code that incorporate instructions (which may be referred to herein, for convenience, as "software" or a "software module") or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and stages have been generally described above in terms of their functionality. Whether such functionality is implemented as hardware or software depends on a particular application and design constraints imposed on the overall system. Experts may implement the described functionality in various ways for each particular application, but such implementation decisions should not be construed as deviating from the scope of this disclosure.

Furthermore, the various illustrative logic blocks, modules, and circuits described in connection with the aspects disclosed herein may be implemented within or realized by an integrated circuit ("IC"), an access terminal, or an access point. The IC may comprise a general purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field of programmable gate array (FPGA), or other programmable logic device, discrete gate, or logic transistor components, discrete hardware components, electrical components, optical components, mechanical components, or any combination thereof designed to perform the functions described in this document, and may execute codes or instructions that reside within the IC, outside the IC, or both. A general purpose processor can be a microprocessor, but alternatively, the processor can be any conventional processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

Any specific order or hierarchy of steps in any disclosed process is understood to be an example of a sample approach. Based on design preferences, it is understood that the specific order or hierarchy of steps in the processes can be rearranged as long as they remain within the scope of this disclosure. The accompanying method claims present elements of the various steps in sample order, and are not intended to be limited to the specific order or hierarchy presented.

The steps of a method or algorithm described in connection with the aspects disclosed in this document can be incorporated directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module (for example, including executable instructions and related data) and other data may reside in data memory such as rAm memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a disk removable disk, a CD-ROM, or any other form of computer-readable storage medium known in the art. A sample storage medium can be attached to a machine such as, for example, a computer / processor (which may be referred to herein, for convenience, as a "processor") the processor of this type can read information (for example, code ) from and write information to the storage medium. A sample storage medium can be integral to the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside on user equipment. Alternatively, the processor and storage medium can reside as discrete components on user equipment. Also, in some respects Any suitable computer program product may comprise a computer-readable medium comprising codes related to one or more of the aspects of the disclosure. In some aspects a computer program product may comprise packaging materials.

While the invention has been described in connection with various aspects, it will be understood that the invention is capable of further modifications. This application is intended to cover any variation, use, or adaptation of the invention that generally follows the principles of the invention, and includes such departures from the present disclosure that fall within known and customary practice within the art to which the one to which the invention belongs.

Claims (14)

A method performed by a user equipment, hereinafter also referred to as UE, comprising: the UE receives a configuration that the UE communicates with a first serving cell and a second serving cell (1505); and the UE receives a configuration of a periodicity to monitor a downlink control signal in the first serving cell (1510), wherein the downlink control signal includes a preference indication, hereinafter also referred to as PI, for the second serving cell, characterized by what the periodicity for monitoring the downlink control signal in the first serving cell includes an integer of symbol or symbols of the second serving cell, in which a subcarrier space, hereinafter also referred to as SCS, of a part activated bandwidth, hereinafter also referred to as BWP, of the first serving cell is different from an SCS of an activated BWP of the second serving cell, in that the UE does not expect to receive a configuration such that the periodicity includes a non-integer number of symbol or symbols of the second serving cell. The method of claim 1, wherein the number of symbols in the second serving cell is a number of symbol or symbols indicated by the PI for the second serving cell. The method of any one of claim 1 or 2, wherein the number of symbols of the second serving cell within the periodicity depends on the SCS of the activated BWP of the second serving cell. The method of any one of claims 1 to 3, wherein if the first serving cell is configured with 60 kHz subcarrier space and the second serving cell is configured with 15 kHz subcarrier space, the UE is configured by a base station with a periodicity of 2 slots or 4 slots to receive a DCI in the first serving cell; me wherein if the first serving cell is configured with 60 kHz subcarrier space and the second serving cell is configured with 15 kHz subcarrier space, the UE is not expected to receive a configuration of a periodicity with 1 slot for receive the DCI in the first serving cell. The method of any one of claims 1 to 4, wherein the downlink control signal includes a PI for the first serving cell. 6. A method performed by a base station, comprising: the base station configures a UE with a first serving cell and a second serving cell (1605); and the base station configures the UE with a periodicity to monitor a downlink control signal in the first serving cell (1610), wherein the downlink control signal comprises a preference indication, hereinafter also referred to as PI, for the second serving cell, characterized by what the base station is not allowed to configure the UE in such a way that the periodicity for monitoring the downlink control signal in the first serving cell comprises a non-integer symbol or symbols of the second serving cell, in which a subcarrier space, hereinafter also referred to as SCS, of an activated bandwidth part, below also referred to as BWP, of the first serving cell is different from an SCS of an activated BWP of the second serving cell. The method of claim 6, wherein the number of symbols of the second serving cell within the periodicity depends on the SCS of the activated BWP of the second serving cell. The method of claim 6 or 7, wherein if the first serving cell is configured with 60 kHz subcarrier space and the second serving cell is configured with 15 kHz subcarrier space, the base station configures the UE with a periodicity of 2 slots or 4 slots to receive a DCI in the first serving cell; and / or wherein if the first serving cell is configured with 60 kHz subcarrier space and the second serving cell is configured with 15 kHz subcarrier space, the base station is not allowed to configure the UE a periodicity with 1 slot to receive the DCI in the first serving cell. The method of any one of claims 6 to 8, wherein when the base station configures the UE with a periodicity to receive Downlink Control Information, hereinafter also referred to as DCI, in the first serving cell, the base station jointly determines the periodicity and the first serving cell, such that an integer symbol or symbols of the second serving cell are within the periodicity. The method of any one of claims 6 to 9, wherein when the base station configures the UE with a periodicity to receive DCI in the first serving cell, the base station jointly determines the periodicity and subcarrier space or spaces. which are configured for the first serving cell and the second serving cell such that an integer number of symbol or symbols of the second serving cell are within periodicity. The method of any one of claims 6 to 10, wherein when the base station configures the UE with a periodicity to receive DCI in the first serving cell, the base station jointly determines the periodicity and whether to configure the UE to monitor two PIs in a serving cell. 12. The method of any one of claims 6 to 11, wherein the downlink control signal includes a PI for the first serving cell. 13. A user equipment, hereinafter also referred to as UE, comprising: a control circuit (306); a processor (308) installed in the control circuit (306); a memory (310) installed in the control circuit (306) and coupled to the processor (308); characterized in that the processor (308) is configured to execute a program code (312) stored in the memory (310) to perform the method steps as defined in any one of the preceding claims 1 to 5. 14. A base station, comprising: a control circuit (306); a processor (308) installed in the control circuit (306); a memory (310) installed in the control circuit (306) and coupled to the processor (308); characterized in that the processor (308) is configured to execute a program code (312) stored in the memory (310) to perform the method steps as defined in any one of the preceding claims 6 to 12.